Finding the Fourth Proportional to 12,429.31, 17,152.46 and 6,840.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.31 : 17,152.46 = 6,840.31 : x
2. Step 2: Convert to fraction form
   12,429.31/17,152.46 = 6,840.31/x
3. Step 3: Cross multiply
   12,429.31x = 17,152.46 × 6,840.31
4. Step 4: Simplify right side
   12,429.31x = 117,328,143.66
5. Step 5: Solve for x
   x = 117,328,143.66/12,429.31
6. Step 6: Final answer
   x = 9,439.63