Finding the Fourth Proportional to 12,499.20, 17,247.48 and 7,194.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,499.20 : 17,247.48 = 7,194.78 : x
2. Step 2: Convert to fraction form
   12,499.20/17,247.48 = 7,194.78/x
3. Step 3: Cross multiply
   12,499.20x = 17,247.48 × 7,194.78
4. Step 4: Simplify right side
   12,499.20x = 124,091,824.15
5. Step 5: Solve for x
   x = 124,091,824.15/12,499.20
6. Step 6: Final answer
   x = 9,927.98