Finding the Fourth Proportional to 12,665.20, 17,476.52 and 7,287.44

Step by Step Solution

1. Step 1: Write the proportion equation
   12,665.20 : 17,476.52 = 7,287.44 : x
2. Step 2: Convert to fraction form
   12,665.20/17,476.52 = 7,287.44/x
3. Step 3: Cross multiply
   12,665.20x = 17,476.52 × 7,287.44
4. Step 4: Simplify right side
   12,665.20x = 127,359,090.91
5. Step 5: Solve for x
   x = 127,359,090.91/12,665.20
6. Step 6: Final answer
   x = 10,055.83