Finding the Fourth Proportional to 103,620.72, 142,996.60 and 58,908.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,620.72 : 142,996.60 = 58,908.72 : x
2. Step 2: Convert to fraction form
   103,620.72/142,996.60 = 58,908.72/x
3. Step 3: Cross multiply
   103,620.72x = 142,996.60 × 58,908.72
4. Step 4: Simplify right side
   103,620.72x = 8,423,746,375.81
5. Step 5: Solve for x
   x = 8,423,746,375.81/103,620.72
6. Step 6: Final answer
   x = 81,294.03