Finding the Fourth Proportional to 12,419.57, 17,139.05 and 7,114.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,419.57 : 17,139.05 = 7,114.43 : x
2. Step 2: Convert to fraction form
   12,419.57/17,139.05 = 7,114.43/x
3. Step 3: Cross multiply
   12,419.57x = 17,139.05 × 7,114.43
4. Step 4: Simplify right side
   12,419.57x = 121,934,450.22
5. Step 5: Solve for x
   x = 121,934,450.22/12,419.57
6. Step 6: Final answer
   x = 9,817.93