Finding the Fourth Proportional to 103,622.50, 142,999.05 and 58,910.50

Step by Step Solution

1. Step 1: Write the proportion equation
   103,622.50 : 142,999.05 = 58,910.50 : x
2. Step 2: Convert to fraction form
   103,622.50/142,999.05 = 58,910.50/x
3. Step 3: Cross multiply
   103,622.50x = 142,999.05 × 58,910.50
4. Step 4: Simplify right side
   103,622.50x = 8,424,145,535.03
5. Step 5: Solve for x
   x = 8,424,145,535.03/103,622.50
6. Step 6: Final answer
   x = 81,296.49