Finding the Fourth Proportional to 12,494.10, 17,242.50 and 7,189.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,494.10 : 17,242.50 = 7,189.71 : x
2. Step 2: Convert to fraction form
   12,494.10/17,242.50 = 7,189.71/x
3. Step 3: Cross multiply
   12,494.10x = 17,242.50 × 7,189.71
4. Step 4: Simplify right side
   12,494.10x = 123,968,574.68
5. Step 5: Solve for x
   x = 123,968,574.68/12,494.10
6. Step 6: Final answer
   x = 9,922.17