Finding the Fourth Proportional to 404,498.44, 606,818.94 and 138,196.36

Step by Step Solution

1. Step 1: Write the proportion equation
   404,498.44 : 606,818.94 = 138,196.36 : x
2. Step 2: Convert to fraction form
   404,498.44/606,818.94 = 138,196.36/x
3. Step 3: Cross multiply
   404,498.44x = 606,818.94 × 138,196.36
4. Step 4: Simplify right side
   404,498.44x = 83,860,168,687.06
5. Step 5: Solve for x
   x = 83,860,168,687.06/404,498.44
6. Step 6: Final answer
   x = 207,318.89