Finding the Fourth Proportional to 404,662,876,615.78, 558,435,425,113.71 and 221,730,912,257.09

Step by Step Solution

1. Step 1: Write the proportion equation
   404,662,876,615.78 : 558,435,425,113.71 = 221,730,912,257.09 : x
2. Step 2: Convert to fraction form
   404,662,876,615.78/558,435,425,113.71 = 221,730,912,257.09/x
3. Step 3: Cross multiply
   404,662,876,615.78x = 558,435,425,113.71 × 221,730,912,257.09
4. Step 4: Simplify right side
   404,662,876,615.78x = 123,822,396,247,138,776,383,488
5. Step 5: Solve for x
   x = 123,822,396,247,138,776,383,488/404,662,876,615.78
6. Step 6: Final answer
   x = 305,989,018,025.75