Finding the Fourth Proportional to 12,456.28, 17,188.80 and 7,006.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456.28 : 17,188.80 = 7,006.17 : x
2. Step 2: Convert to fraction form
   12,456.28/17,188.80 = 7,006.17/x
3. Step 3: Cross multiply
   12,456.28x = 17,188.80 × 7,006.17
4. Step 4: Simplify right side
   12,456.28x = 120,427,654.90
5. Step 5: Solve for x
   x = 120,427,654.90/12,456.28
6. Step 6: Final answer
   x = 9,668.03