Finding the Fourth Proportional to 12,660.40, 17,467.50 and 7,354.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,660.40 : 17,467.50 = 7,354.18 : x
2. Step 2: Convert to fraction form
   12,660.40/17,467.50 = 7,354.18/x
3. Step 3: Cross multiply
   12,660.40x = 17,467.50 × 7,354.18
4. Step 4: Simplify right side
   12,660.40x = 128,459,139.15
5. Step 5: Solve for x
   x = 128,459,139.15/12,660.40
6. Step 6: Final answer
   x = 10,146.53