Finding the Fourth Proportional to 8,956.32, 12,264.17 and 8,603.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,956.32 : 12,264.17 = 8,603.40 : x
2. Step 2: Convert to fraction form
   8,956.32/12,264.17 = 8,603.40/x
3. Step 3: Cross multiply
   8,956.32x = 12,264.17 × 8,603.40
4. Step 4: Simplify right side
   8,956.32x = 105,513,517.16
5. Step 5: Solve for x
   x = 105,513,517.16/8,956.32
6. Step 6: Final answer
   x = 11,780.90