Finding the Fourth Proportional to 137,429.16, 205,728.72 and 124,287.72

Step by Step Solution

1. Step 1: Write the proportion equation
   137,429.16 : 205,728.72 = 124,287.72 : x
2. Step 2: Convert to fraction form
   137,429.16/205,728.72 = 124,287.72/x
3. Step 3: Cross multiply
   137,429.16x = 205,728.72 × 124,287.72
4. Step 4: Simplify right side
   137,429.16x = 25,569,553,547.32
5. Step 5: Solve for x
   x = 25,569,553,547.32/137,429.16
6. Step 6: Final answer
   x = 186,056.25