Finding the Fourth Proportional to 137,105.86, 205,575.76 and 89,663.69

Step by Step Solution

1. Step 1: Write the proportion equation
   137,105.86 : 205,575.76 = 89,663.69 : x
2. Step 2: Convert to fraction form
   137,105.86/205,575.76 = 89,663.69/x
3. Step 3: Cross multiply
   137,105.86x = 205,575.76 × 89,663.69
4. Step 4: Simplify right side
   137,105.86x = 18,432,681,216.15
5. Step 5: Solve for x
   x = 18,432,681,216.15/137,105.86
6. Step 6: Final answer
   x = 134,441.24