Finding the Fourth Proportional to 137,103.86, 205,572.76 and 89,661.69

Step by Step Solution

1. Step 1: Write the proportion equation
   137,103.86 : 205,572.76 = 89,661.69 : x
2. Step 2: Convert to fraction form
   137,103.86/205,572.76 = 89,661.69/x
3. Step 3: Cross multiply
   137,103.86x = 205,572.76 × 89,661.69
4. Step 4: Simplify right side
   137,103.86x = 18,432,000,855.41
5. Step 5: Solve for x
   x = 18,432,000,855.41/137,103.86
6. Step 6: Final answer
   x = 134,438.23