Finding the Fourth Proportional to 3,889.80, 5,366.00 and 2,563.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,889.80 : 5,366.00 = 2,563.02 : x
2. Step 2: Convert to fraction form
   3,889.80/5,366.00 = 2,563.02/x
3. Step 3: Cross multiply
   3,889.80x = 5,366.00 × 2,563.02
4. Step 4: Simplify right side
   3,889.80x = 13,753,152.50
5. Step 5: Solve for x
   x = 13,753,152.50/3,889.80
6. Step 6: Final answer
   x = 3,535.70