Finding the Fourth Proportional to 89,630.75, 123,423.66 and 87,641.69

Step by Step Solution

1. Step 1: Write the proportion equation
   89,630.75 : 123,423.66 = 87,641.69 : x
2. Step 2: Convert to fraction form
   89,630.75/123,423.66 = 87,641.69/x
3. Step 3: Cross multiply
   89,630.75x = 123,423.66 × 87,641.69
4. Step 4: Simplify right side
   89,630.75x = 10,817,057,531.27
5. Step 5: Solve for x
   x = 10,817,057,531.27/89,630.75
6. Step 6: Final answer
   x = 120,684.68