Finding the Fourth Proportional to 1,412.72, 1,949.55 and 783.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,412.72 : 1,949.55 = 783.25 : x
2. Step 2: Convert to fraction form
   1,412.72/1,949.55 = 783.25/x
3. Step 3: Cross multiply
   1,412.72x = 1,949.55 × 783.25
4. Step 4: Simplify right side
   1,412.72x = 1,526,985.04
5. Step 5: Solve for x
   x = 1,526,985.04/1,412.72
6. Step 6: Final answer
   x = 1,080.88