Finding the Fourth Proportional to 103,622.72, 142,999.36 and 58,910.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,622.72 : 142,999.36 = 58,910.72 : x
2. Step 2: Convert to fraction form
   103,622.72/142,999.36 = 58,910.72/x
3. Step 3: Cross multiply
   103,622.72x = 142,999.36 × 58,910.72
4. Step 4: Simplify right side
   103,622.72x = 8,424,195,257.14
5. Step 5: Solve for x
   x = 8,424,195,257.14/103,622.72
6. Step 6: Final answer
   x = 81,296.80