Finding the Fourth Proportional to 65,216.98, 89,967.39 and 42,545.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,216.98 : 89,967.39 = 42,545.50 : x
2. Step 2: Convert to fraction form
   65,216.98/89,967.39 = 42,545.50/x
3. Step 3: Cross multiply
   65,216.98x = 89,967.39 × 42,545.50
4. Step 4: Simplify right side
   65,216.98x = 3,827,707,591.25
5. Step 5: Solve for x
   x = 3,827,707,591.25/65,216.98
6. Step 6: Final answer
   x = 58,691.89