Finding the Fourth Proportional to 1,342.95, 1,852.86 and 783.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.95 : 1,852.86 = 783.05 : x
2. Step 2: Convert to fraction form
   1,342.95/1,852.86 = 783.05/x
3. Step 3: Cross multiply
   1,342.95x = 1,852.86 × 783.05
4. Step 4: Simplify right side
   1,342.95x = 1,450,876.15
5. Step 5: Solve for x
   x = 1,450,876.15/1,342.95
6. Step 6: Final answer
   x = 1,080.36