Finding the Fourth Proportional to 12,499.48, 17,244.36 and 7,191.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,499.48 : 17,244.36 = 7,191.12 : x
2. Step 2: Convert to fraction form
   12,499.48/17,244.36 = 7,191.12/x
3. Step 3: Cross multiply
   12,499.48x = 17,244.36 × 7,191.12
4. Step 4: Simplify right side
   12,499.48x = 124,006,262.08
5. Step 5: Solve for x
   x = 124,006,262.08/12,499.48
6. Step 6: Final answer
   x = 9,920.91