Finding the Fourth Proportional to 12,427.79, 17,144.70 and 7,389.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,427.79 : 17,144.70 = 7,389.15 : x
2. Step 2: Convert to fraction form
   12,427.79/17,144.70 = 7,389.15/x
3. Step 3: Cross multiply
   12,427.79x = 17,144.70 × 7,389.15
4. Step 4: Simplify right side
   12,427.79x = 126,684,760.01
5. Step 5: Solve for x
   x = 126,684,760.01/12,427.79
6. Step 6: Final answer
   x = 10,193.67