Finding the Fourth Proportional to 12,471.30, 17,209.53 and 7,164.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,471.30 : 17,209.53 = 7,164.18 : x
2. Step 2: Convert to fraction form
   12,471.30/17,209.53 = 7,164.18/x
3. Step 3: Cross multiply
   12,471.30x = 17,209.53 × 7,164.18
4. Step 4: Simplify right side
   12,471.30x = 123,292,170.64
5. Step 5: Solve for x
   x = 123,292,170.64/12,471.30
6. Step 6: Final answer
   x = 9,886.07