Finding the Fourth Proportional to 12,429.43, 17,152.61 and 6,840.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.43 : 17,152.61 = 6,840.43 : x
2. Step 2: Convert to fraction form
   12,429.43/17,152.61 = 6,840.43/x
3. Step 3: Cross multiply
   12,429.43x = 17,152.61 × 6,840.43
4. Step 4: Simplify right side
   12,429.43x = 117,331,193.82
5. Step 5: Solve for x
   x = 117,331,193.82/12,429.43
6. Step 6: Final answer
   x = 9,439.79