Finding the Fourth Proportional to 12,688.71, 17,510.46 and 7,023.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,688.71 : 17,510.46 = 7,023.85 : x
2. Step 2: Convert to fraction form
   12,688.71/17,510.46 = 7,023.85/x
3. Step 3: Cross multiply
   12,688.71x = 17,510.46 × 7,023.85
4. Step 4: Simplify right side
   12,688.71x = 122,990,844.47
5. Step 5: Solve for x
   x = 122,990,844.47/12,688.71
6. Step 6: Final answer
   x = 9,692.94