Finding the Fourth Proportional to 12,688.74, 17,498.82 and 10,895.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,688.74 : 17,498.82 = 10,895.61 : x
2. Step 2: Convert to fraction form
   12,688.74/17,498.82 = 10,895.61/x
3. Step 3: Cross multiply
   12,688.74x = 17,498.82 × 10,895.61
4. Step 4: Simplify right side
   12,688.74x = 190,660,261.69
5. Step 5: Solve for x
   x = 190,660,261.69/12,688.74
6. Step 6: Final answer
   x = 15,025.95