Finding the Fourth Proportional to 410,085,054.72, 565,915,338.72 and 221,913,216

Step by Step Solution

1. Step 1: Write the proportion equation
   410,085,054.72 : 565,915,338.72 = 221,913,216 : x
2. Step 2: Convert to fraction form
   410,085,054.72/565,915,338.72 = 221,913,216/x
3. Step 3: Cross multiply
   410,085,054.72x = 565,915,338.72 × 221,913,216
4. Step 4: Simplify right side
   410,085,054.72x = 125,584,092,799,084,528
5. Step 5: Solve for x
   x = 125,584,092,799,084,528/410,085,054.72
6. Step 6: Final answer
   x = 306,239,135.89