Finding the Fourth Proportional to 1,412.69, 1,949.49 and 783.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,412.69 : 1,949.49 = 783.18 : x
2. Step 2: Convert to fraction form
   1,412.69/1,949.49 = 783.18/x
3. Step 3: Cross multiply
   1,412.69x = 1,949.49 × 783.18
4. Step 4: Simplify right side
   1,412.69x = 1,526,801.58
5. Step 5: Solve for x
   x = 1,526,801.58/1,412.69
6. Step 6: Final answer
   x = 1,080.78