Finding the Fourth Proportional to 9,001.50, 12,423.32 and 6,491.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,001.50 : 12,423.32 = 6,491.91 : x
2. Step 2: Convert to fraction form
   9,001.50/12,423.32 = 6,491.91/x
3. Step 3: Cross multiply
   9,001.50x = 12,423.32 × 6,491.91
4. Step 4: Simplify right side
   9,001.50x = 80,651,150.33
5. Step 5: Solve for x
   x = 80,651,150.33/9,001.50
6. Step 6: Final answer
   x = 8,959.75