Finding the Fourth Proportional to 89,307.47, 134,495.82 and 81,335.86

Step by Step Solution

1. Step 1: Write the proportion equation
   89,307.47 : 134,495.82 = 81,335.86 : x
2. Step 2: Convert to fraction form
   89,307.47/134,495.82 = 81,335.86/x
3. Step 3: Cross multiply
   89,307.47x = 134,495.82 × 81,335.86
4. Step 4: Simplify right side
   89,307.47x = 10,939,332,513.63
5. Step 5: Solve for x
   x = 10,939,332,513.63/89,307.47
6. Step 6: Final answer
   x = 122,490.68