Finding the Fourth Proportional to 404,437.54, 606,656.24 and 138,200.34

Step by Step Solution

1. Step 1: Write the proportion equation
   404,437.54 : 606,656.24 = 138,200.34 : x
2. Step 2: Convert to fraction form
   404,437.54/606,656.24 = 138,200.34/x
3. Step 3: Cross multiply
   404,437.54x = 606,656.24 × 138,200.34
4. Step 4: Simplify right side
   404,437.54x = 83,840,098,631.12
5. Step 5: Solve for x
   x = 83,840,098,631.12/404,437.54
6. Step 6: Final answer
   x = 207,300.49