Finding the Fourth Proportional to 12,456.20, 17,181.96 and 7,417.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456.20 : 17,181.96 = 7,417.04 : x
2. Step 2: Convert to fraction form
   12,456.20/17,181.96 = 7,417.04/x
3. Step 3: Cross multiply
   12,456.20x = 17,181.96 × 7,417.04
4. Step 4: Simplify right side
   12,456.20x = 127,439,284.60
5. Step 5: Solve for x
   x = 127,439,284.60/12,456.20
6. Step 6: Final answer
   x = 10,230.99