Finding the Fourth Proportional to 12,409.20, 17,123.04 and 7,031.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,409.20 : 17,123.04 = 7,031.52 : x
2. Step 2: Convert to fraction form
   12,409.20/17,123.04 = 7,031.52/x
3. Step 3: Cross multiply
   12,409.20x = 17,123.04 × 7,031.52
4. Step 4: Simplify right side
   12,409.20x = 120,400,998.22
5. Step 5: Solve for x
   x = 120,400,998.22/12,409.20
6. Step 6: Final answer
   x = 9,702.56