Finding the Fourth Proportional to 492,053.30, 737,979.15 and 136,978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   492,053.30 : 737,979.15 = 136,978.10 : x
2. Step 2: Convert to fraction form
   492,053.30/737,979.15 = 136,978.10/x
3. Step 3: Cross multiply
   492,053.30x = 737,979.15 × 136,978.10
4. Step 4: Simplify right side
   492,053.30x = 101,086,981,806.62
5. Step 5: Solve for x
   x = 101,086,981,806.62/492,053.30
6. Step 6: Final answer
   x = 205,439.09