Finding the Fourth Proportional to 8,895.32, 12,266.31 and 7,640.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,895.32 : 12,266.31 = 7,640.50 : x
2. Step 2: Convert to fraction form
   8,895.32/12,266.31 = 7,640.50/x
3. Step 3: Cross multiply
   8,895.32x = 12,266.31 × 7,640.50
4. Step 4: Simplify right side
   8,895.32x = 93,720,741.56
5. Step 5: Solve for x
   x = 93,720,741.56/8,895.32
6. Step 6: Final answer
   x = 10,535.96