Finding the Fourth Proportional to 91,527.79, 137,078.46 and 89,005.23

Step by Step Solution

1. Step 1: Write the proportion equation
   91,527.79 : 137,078.46 = 89,005.23 : x
2. Step 2: Convert to fraction form
   91,527.79/137,078.46 = 89,005.23/x
3. Step 3: Cross multiply
   91,527.79x = 137,078.46 × 89,005.23
4. Step 4: Simplify right side
   91,527.79x = 12,200,699,860.35
5. Step 5: Solve for x
   x = 12,200,699,860.35/91,527.79
6. Step 6: Final answer
   x = 133,300.50