Finding the Fourth Proportional to 12,475.40, 17,219.52 and 7,171.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,475.40 : 17,219.52 = 7,171.92 : x
2. Step 2: Convert to fraction form
   12,475.40/17,219.52 = 7,171.92/x
3. Step 3: Cross multiply
   12,475.40x = 17,219.52 × 7,171.92
4. Step 4: Simplify right side
   12,475.40x = 123,497,019.88
5. Step 5: Solve for x
   x = 123,497,019.88/12,475.40
6. Step 6: Final answer
   x = 9,899.25