Finding the Fourth Proportional to 1,766.80, 2,439.58 and 1,434.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,766.80 : 2,439.58 = 1,434.70 : x
2. Step 2: Convert to fraction form
   1,766.80/2,439.58 = 1,434.70/x
3. Step 3: Cross multiply
   1,766.80x = 2,439.58 × 1,434.70
4. Step 4: Simplify right side
   1,766.80x = 3,500,065.43
5. Step 5: Solve for x
   x = 3,500,065.43/1,766.80
6. Step 6: Final answer
   x = 1,981.02