Finding the Fourth Proportional to 103,632.50, 143,012.86 and 58,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   103,632.50 : 143,012.86 = 58,920.50 : x
2. Step 2: Convert to fraction form
   103,632.50/143,012.86 = 58,920.50/x
3. Step 3: Cross multiply
   103,632.50x = 143,012.86 × 58,920.50
4. Step 4: Simplify right side
   103,632.50x = 8,426,389,217.63
5. Step 5: Solve for x
   x = 8,426,389,217.63/103,632.50
6. Step 6: Final answer
   x = 81,310.30