Finding the Fourth Proportional to 12,425.86, 17,146.41 and 7,047.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,425.86 : 17,146.41 = 7,047.21 : x
2. Step 2: Convert to fraction form
   12,425.86/17,146.41 = 7,047.21/x
3. Step 3: Cross multiply
   12,425.86x = 17,146.41 × 7,047.21
4. Step 4: Simplify right side
   12,425.86x = 120,834,361.48
5. Step 5: Solve for x
   x = 120,834,361.48/12,425.86
6. Step 6: Final answer
   x = 9,724.42