Finding the Fourth Proportional to 5,866.50, 8,102.39 and 3,885.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,866.50 : 8,102.39 = 3,885.78 : x
2. Step 2: Convert to fraction form
   5,866.50/8,102.39 = 3,885.78/x
3. Step 3: Cross multiply
   5,866.50x = 8,102.39 × 3,885.78
4. Step 4: Simplify right side
   5,866.50x = 31,484,085.59
5. Step 5: Solve for x
   x = 31,484,085.59/5,866.50
6. Step 6: Final answer
   x = 5,366.76