Finding the Fourth Proportional to 1,412.80, 1,949.59 and 783.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,412.80 : 1,949.59 = 783.29 : x
2. Step 2: Convert to fraction form
   1,412.80/1,949.59 = 783.29/x
3. Step 3: Cross multiply
   1,412.80x = 1,949.59 × 783.29
4. Step 4: Simplify right side
   1,412.80x = 1,527,093.85
5. Step 5: Solve for x
   x = 1,527,093.85/1,412.80
6. Step 6: Final answer
   x = 1,080.90