Finding the Fourth Proportional to 8,895.31, 12,266.31 and 7,640.51

Step by Step Solution

1. Step 1: Write the proportion equation
   8,895.31 : 12,266.31 = 7,640.51 : x
2. Step 2: Convert to fraction form
   8,895.31/12,266.31 = 7,640.51/x
3. Step 3: Cross multiply
   8,895.31x = 12,266.31 × 7,640.51
4. Step 4: Simplify right side
   8,895.31x = 93,720,864.22
5. Step 5: Solve for x
   x = 93,720,864.22/8,895.31
6. Step 6: Final answer
   x = 10,535.99