Finding the Fourth Proportional to 1,340.35, 1,849.59 and 780.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.35 : 1,849.59 = 780.73 : x
2. Step 2: Convert to fraction form
   1,340.35/1,849.59 = 780.73/x
3. Step 3: Cross multiply
   1,340.35x = 1,849.59 × 780.73
4. Step 4: Simplify right side
   1,340.35x = 1,444,025.78
5. Step 5: Solve for x
   x = 1,444,025.78/1,340.35
6. Step 6: Final answer
   x = 1,077.35