Finding the Fourth Proportional to 12,475.11, 17,218.61 and 7,173.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,475.11 : 17,218.61 = 7,173.01 : x
2. Step 2: Convert to fraction form
   12,475.11/17,218.61 = 7,173.01/x
3. Step 3: Cross multiply
   12,475.11x = 17,218.61 × 7,173.01
4. Step 4: Simplify right side
   12,475.11x = 123,509,261.72
5. Step 5: Solve for x
   x = 123,509,261.72/12,475.11
6. Step 6: Final answer
   x = 9,900.45