Finding the Fourth Proportional to 8,813.98, 12,165.33 and 5,664.70

Step by Step Solution

1. Step 1: Write the proportion equation
   8,813.98 : 12,165.33 = 5,664.70 : x
2. Step 2: Convert to fraction form
   8,813.98/12,165.33 = 5,664.70/x
3. Step 3: Cross multiply
   8,813.98x = 12,165.33 × 5,664.70
4. Step 4: Simplify right side
   8,813.98x = 68,912,943.81
5. Step 5: Solve for x
   x = 68,912,943.81/8,813.98
6. Step 6: Final answer
   x = 7,818.60