Finding the Fourth Proportional to 12,666.06, 17,479.20 and 7,361.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,666.06 : 17,479.20 = 7,361.88 : x
2. Step 2: Convert to fraction form
   12,666.06/17,479.20 = 7,361.88/x
3. Step 3: Cross multiply
   12,666.06x = 17,479.20 × 7,361.88
4. Step 4: Simplify right side
   12,666.06x = 128,679,772.90
5. Step 5: Solve for x
   x = 128,679,772.90/12,666.06
6. Step 6: Final answer
   x = 10,159.42