Finding the Fourth Proportional to 12,429.54, 17,152.77 and 6,840.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.54 : 17,152.77 = 6,840.50 : x
2. Step 2: Convert to fraction form
   12,429.54/17,152.77 = 6,840.50/x
3. Step 3: Cross multiply
   12,429.54x = 17,152.77 × 6,840.50
4. Step 4: Simplify right side
   12,429.54x = 117,333,523.19
5. Step 5: Solve for x
   x = 117,333,523.19/12,429.54
6. Step 6: Final answer
   x = 9,439.89