Finding the Fourth Proportional to 12,429.59, 17,152.79 and 6,840.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.59 : 17,152.79 = 6,840.59 : x
2. Step 2: Convert to fraction form
   12,429.59/17,152.79 = 6,840.59/x
3. Step 3: Cross multiply
   12,429.59x = 17,152.79 × 6,840.59
4. Step 4: Simplify right side
   12,429.59x = 117,335,083.78
5. Step 5: Solve for x
   x = 117,335,083.78/12,429.59
6. Step 6: Final answer
   x = 9,439.98