Finding the Fourth Proportional to 91,526.79, 137,076.96 and 89,004.23

Step by Step Solution

1. Step 1: Write the proportion equation
   91,526.79 : 137,076.96 = 89,004.23 : x
2. Step 2: Convert to fraction form
   91,526.79/137,076.96 = 89,004.23/x
3. Step 3: Cross multiply
   91,526.79x = 137,076.96 × 89,004.23
4. Step 4: Simplify right side
   91,526.79x = 12,200,428,937.31
5. Step 5: Solve for x
   x = 12,200,428,937.31/91,526.79
6. Step 6: Final answer
   x = 133,298.99