Finding the Fourth Proportional to 1,340.03, 1,849.46 and 780.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.03 : 1,849.46 = 780.86 : x
2. Step 2: Convert to fraction form
   1,340.03/1,849.46 = 780.86/x
3. Step 3: Cross multiply
   1,340.03x = 1,849.46 × 780.86
4. Step 4: Simplify right side
   1,340.03x = 1,444,169.34
5. Step 5: Solve for x
   x = 1,444,169.34/1,340.03
6. Step 6: Final answer
   x = 1,077.71