Finding the Fourth Proportional to 103,428.84, 142,731.72 and 58,716.84

Step by Step Solution

1. Step 1: Write the proportion equation
   103,428.84 : 142,731.72 = 58,716.84 : x
2. Step 2: Convert to fraction form
   103,428.84/142,731.72 = 58,716.84/x
3. Step 3: Cross multiply
   103,428.84x = 142,731.72 × 58,716.84
4. Step 4: Simplify right side
   103,428.84x = 8,380,755,566.16
5. Step 5: Solve for x
   x = 8,380,755,566.16/103,428.84
6. Step 6: Final answer
   x = 81,029.19