Finding the Fourth Proportional to 1,341.30, 1,850.94 and 781.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.30 : 1,850.94 = 781.80 : x
2. Step 2: Convert to fraction form
   1,341.30/1,850.94 = 781.80/x
3. Step 3: Cross multiply
   1,341.30x = 1,850.94 × 781.80
4. Step 4: Simplify right side
   1,341.30x = 1,447,064.89
5. Step 5: Solve for x
   x = 1,447,064.89/1,341.30
6. Step 6: Final answer
   x = 1,078.85