Finding the Fourth Proportional to 12,459.10, 17,192.28 and 7,154.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,459.10 : 17,192.28 = 7,154.70 : x
2. Step 2: Convert to fraction form
   12,459.10/17,192.28 = 7,154.70/x
3. Step 3: Cross multiply
   12,459.10x = 17,192.28 × 7,154.70
4. Step 4: Simplify right side
   12,459.10x = 123,005,605.72
5. Step 5: Solve for x
   x = 123,005,605.72/12,459.10
6. Step 6: Final answer
   x = 9,872.75