Finding the Fourth Proportional to 12,492.24, 17,240.52 and 7,187.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,492.24 : 17,240.52 = 7,187.28 : x
2. Step 2: Convert to fraction form
   12,492.24/17,240.52 = 7,187.28/x
3. Step 3: Cross multiply
   12,492.24x = 17,240.52 × 7,187.28
4. Step 4: Simplify right side
   12,492.24x = 123,912,444.59
5. Step 5: Solve for x
   x = 123,912,444.59/12,492.24
6. Step 6: Final answer
   x = 9,919.15