Finding the Fourth Proportional to 12,494.09, 17,242.52 and 7,189.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,494.09 : 17,242.52 = 7,189.72 : x
2. Step 2: Convert to fraction form
   12,494.09/17,242.52 = 7,189.72/x
3. Step 3: Cross multiply
   12,494.09x = 17,242.52 × 7,189.72
4. Step 4: Simplify right side
   12,494.09x = 123,968,811.84
5. Step 5: Solve for x
   x = 123,968,811.84/12,494.09
6. Step 6: Final answer
   x = 9,922.19