Finding the Fourth Proportional to 8,866.88, 13,300.71 and 3,318.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,866.88 : 13,300.71 = 3,318.78 : x
2. Step 2: Convert to fraction form
   8,866.88/13,300.71 = 3,318.78/x
3. Step 3: Cross multiply
   8,866.88x = 13,300.71 × 3,318.78
4. Step 4: Simplify right side
   8,866.88x = 44,142,130.33
5. Step 5: Solve for x
   x = 44,142,130.33/8,866.88
6. Step 6: Final answer
   x = 4,978.32