Finding the Fourth Proportional to 3,763.57, 5,643.31 and 2,988.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,763.57 : 5,643.31 = 2,988.55 : x
2. Step 2: Convert to fraction form
   3,763.57/5,643.31 = 2,988.55/x
3. Step 3: Cross multiply
   3,763.57x = 5,643.31 × 2,988.55
4. Step 4: Simplify right side
   3,763.57x = 16,865,314.10
5. Step 5: Solve for x
   x = 16,865,314.10/3,763.57
6. Step 6: Final answer
   x = 4,481.20