Finding the Fourth Proportional to 2,766.80, 4,152.90 and 1,381.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,766.80 : 4,152.90 = 1,381.70 : x
2. Step 2: Convert to fraction form
   2,766.80/4,152.90 = 1,381.70/x
3. Step 3: Cross multiply
   2,766.80x = 4,152.90 × 1,381.70
4. Step 4: Simplify right side
   2,766.80x = 5,738,061.93
5. Step 5: Solve for x
   x = 5,738,061.93/2,766.80
6. Step 6: Final answer
   x = 2,073.90