Finding the Fourth Proportional to 12,659.31, 17,471.57 and 9,510.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,659.31 : 17,471.57 = 9,510.03 : x
2. Step 2: Convert to fraction form
   12,659.31/17,471.57 = 9,510.03/x
3. Step 3: Cross multiply
   12,659.31x = 17,471.57 × 9,510.03
4. Step 4: Simplify right side
   12,659.31x = 166,155,107.30
5. Step 5: Solve for x
   x = 166,155,107.30/12,659.31
6. Step 6: Final answer
   x = 13,125.13