Finding the Fourth Proportional to 1,342.68, 1,853.02 and 783.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.68 : 1,853.02 = 783.10 : x
2. Step 2: Convert to fraction form
   1,342.68/1,853.02 = 783.10/x
3. Step 3: Cross multiply
   1,342.68x = 1,853.02 × 783.10
4. Step 4: Simplify right side
   1,342.68x = 1,451,099.96
5. Step 5: Solve for x
   x = 1,451,099.96/1,342.68
6. Step 6: Final answer
   x = 1,080.75