Finding the Fourth Proportional to 103,436.25, 142,742.16 and 58,724.25

Step by Step Solution

1. Step 1: Write the proportion equation
   103,436.25 : 142,742.16 = 58,724.25 : x
2. Step 2: Convert to fraction form
   103,436.25/142,742.16 = 58,724.25/x
3. Step 3: Cross multiply
   103,436.25x = 142,742.16 × 58,724.25
4. Step 4: Simplify right side
   103,436.25x = 8,382,426,289.38
5. Step 5: Solve for x
   x = 8,382,426,289.38/103,436.25
6. Step 6: Final answer
   x = 81,039.54