Finding the Fourth Proportional to 89,800.49, 123,915.91 and 55,339.86

Step by Step Solution

1. Step 1: Write the proportion equation
   89,800.49 : 123,915.91 = 55,339.86 : x
2. Step 2: Convert to fraction form
   89,800.49/123,915.91 = 55,339.86/x
3. Step 3: Cross multiply
   89,800.49x = 123,915.91 × 55,339.86
4. Step 4: Simplify right side
   89,800.49x = 6,857,488,834.47
5. Step 5: Solve for x
   x = 6,857,488,834.47/89,800.49
6. Step 6: Final answer
   x = 76,363.61