Finding the Fourth Proportional to 89,152.96, 133,641.48 and 42,438.64

Step by Step Solution

1. Step 1: Write the proportion equation
   89,152.96 : 133,641.48 = 42,438.64 : x
2. Step 2: Convert to fraction form
   89,152.96/133,641.48 = 42,438.64/x
3. Step 3: Cross multiply
   89,152.96x = 133,641.48 × 42,438.64
4. Step 4: Simplify right side
   89,152.96x = 5,671,562,658.79
5. Step 5: Solve for x
   x = 5,671,562,658.79/89,152.96
6. Step 6: Final answer
   x = 63,616.09