Finding the Fourth Proportional to 91,073.33, 137,310.77 and 89,440.37

Step by Step Solution

1. Step 1: Write the proportion equation
   91,073.33 : 137,310.77 = 89,440.37 : x
2. Step 2: Convert to fraction form
   91,073.33/137,310.77 = 89,440.37/x
3. Step 3: Cross multiply
   91,073.33x = 137,310.77 × 89,440.37
4. Step 4: Simplify right side
   91,073.33x = 12,281,124,940.03
5. Step 5: Solve for x
   x = 12,281,124,940.03/91,073.33
6. Step 6: Final answer
   x = 134,848.76