Finding the Fourth Proportional to 12,506.54, 17,257.46 and 7,129.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,506.54 : 17,257.46 = 7,129.76 : x
2. Step 2: Convert to fraction form
   12,506.54/17,257.46 = 7,129.76/x
3. Step 3: Cross multiply
   12,506.54x = 17,257.46 × 7,129.76
4. Step 4: Simplify right side
   12,506.54x = 123,041,426.07
5. Step 5: Solve for x
   x = 123,041,426.07/12,506.54
6. Step 6: Final answer
   x = 9,838.17