Finding the Fourth Proportional to 89,372.79, 133,855.02 and 42,658.47

Step by Step Solution

1. Step 1: Write the proportion equation
   89,372.79 : 133,855.02 = 42,658.47 : x
2. Step 2: Convert to fraction form
   89,372.79/133,855.02 = 42,658.47/x
3. Step 3: Cross multiply
   89,372.79x = 133,855.02 × 42,658.47
4. Step 4: Simplify right side
   89,372.79x = 5,710,050,355.02
5. Step 5: Solve for x
   x = 5,710,050,355.02/89,372.79
6. Step 6: Final answer
   x = 63,890.26