Finding the Fourth Proportional to 12,434.94, 17,162.52 and 7,129.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,434.94 : 17,162.52 = 7,129.80 : x
2. Step 2: Convert to fraction form
   12,434.94/17,162.52 = 7,129.80/x
3. Step 3: Cross multiply
   12,434.94x = 17,162.52 × 7,129.80
4. Step 4: Simplify right side
   12,434.94x = 122,365,335.10
5. Step 5: Solve for x
   x = 122,365,335.10/12,434.94
6. Step 6: Final answer
   x = 9,840.44