Finding the Fourth Proportional to 103,222.50, 142,449.21 and 58,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   103,222.50 : 142,449.21 = 58,510.50 : x
2. Step 2: Convert to fraction form
   103,222.50/142,449.21 = 58,510.50/x
3. Step 3: Cross multiply
   103,222.50x = 142,449.21 × 58,510.50
4. Step 4: Simplify right side
   103,222.50x = 8,334,774,501.71
5. Step 5: Solve for x
   x = 8,334,774,501.71/103,222.50
6. Step 6: Final answer
   x = 80,745.71