Finding the Fourth Proportional to 12,686.32, 17,523.86 and 9,738.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,686.32 : 17,523.86 = 9,738.58 : x
2. Step 2: Convert to fraction form
   12,686.32/17,523.86 = 9,738.58/x
3. Step 3: Cross multiply
   12,686.32x = 17,523.86 × 9,738.58
4. Step 4: Simplify right side
   12,686.32x = 170,657,512.52
5. Step 5: Solve for x
   x = 170,657,512.52/12,686.32
6. Step 6: Final answer
   x = 13,452.09