Finding the Fourth Proportional to 1,340.07, 1,849.15 and 780.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.07 : 1,849.15 = 780.41 : x
2. Step 2: Convert to fraction form
   1,340.07/1,849.15 = 780.41/x
3. Step 3: Cross multiply
   1,340.07x = 1,849.15 × 780.41
4. Step 4: Simplify right side
   1,340.07x = 1,443,097.74
5. Step 5: Solve for x
   x = 1,443,097.74/1,340.07
6. Step 6: Final answer
   x = 1,076.88