Finding the Fourth Proportional to 103,621.69, 142,997.93 and 58,909.69

Step by Step Solution

1. Step 1: Write the proportion equation
   103,621.69 : 142,997.93 = 58,909.69 : x
2. Step 2: Convert to fraction form
   103,621.69/142,997.93 = 58,909.69/x
3. Step 3: Cross multiply
   103,621.69x = 142,997.93 × 58,909.69
4. Step 4: Simplify right side
   103,621.69x = 8,423,963,516.72
5. Step 5: Solve for x
   x = 8,423,963,516.72/103,621.69
6. Step 6: Final answer
   x = 81,295.37