Finding the Fourth Proportional to 12,477.38, 17,216.82 and 7,171.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,477.38 : 17,216.82 = 7,171.20 : x
2. Step 2: Convert to fraction form
   12,477.38/17,216.82 = 7,171.20/x
3. Step 3: Cross multiply
   12,477.38x = 17,216.82 × 7,171.20
4. Step 4: Simplify right side
   12,477.38x = 123,465,259.58
5. Step 5: Solve for x
   x = 123,465,259.58/12,477.38
6. Step 6: Final answer
   x = 9,895.13