Finding the Fourth Proportional to 12,886.89, 17,759.01 and 9,154.41

Step by Step Solution

1. Step 1: Write the proportion equation
   12,886.89 : 17,759.01 = 9,154.41 : x
2. Step 2: Convert to fraction form
   12,886.89/17,759.01 = 9,154.41/x
3. Step 3: Cross multiply
   12,886.89x = 17,759.01 × 9,154.41
4. Step 4: Simplify right side
   12,886.89x = 162,573,258.73
5. Step 5: Solve for x
   x = 162,573,258.73/12,886.89
6. Step 6: Final answer
   x = 12,615.40