Finding the Fourth Proportional to 1,342.85, 1,853.24 and 783.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.85 : 1,853.24 = 783.23 : x
2. Step 2: Convert to fraction form
   1,342.85/1,853.24 = 783.23/x
3. Step 3: Cross multiply
   1,342.85x = 1,853.24 × 783.23
4. Step 4: Simplify right side
   1,342.85x = 1,451,499.98
5. Step 5: Solve for x
   x = 1,451,499.98/1,342.85
6. Step 6: Final answer
   x = 1,080.91