Finding the Fourth Proportional to 12,730.50, 17,569.71 and 7,141.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,730.50 : 17,569.71 = 7,141.50 : x
2. Step 2: Convert to fraction form
   12,730.50/17,569.71 = 7,141.50/x
3. Step 3: Cross multiply
   12,730.50x = 17,569.71 × 7,141.50
4. Step 4: Simplify right side
   12,730.50x = 125,474,083.97
5. Step 5: Solve for x
   x = 125,474,083.97/12,730.50
6. Step 6: Final answer
   x = 9,856.18