Finding the Fourth Proportional to 404,306.15, 606,513.89 and 137,995.16

Step by Step Solution

1. Step 1: Write the proportion equation
   404,306.15 : 606,513.89 = 137,995.16 : x
2. Step 2: Convert to fraction form
   404,306.15/606,513.89 = 137,995.16/x
3. Step 3: Cross multiply
   404,306.15x = 606,513.89 × 137,995.16
4. Step 4: Simplify right side
   404,306.15x = 83,695,978,605.19
5. Step 5: Solve for x
   x = 83,695,978,605.19/404,306.15
6. Step 6: Final answer
   x = 207,011.39