Finding the Fourth Proportional to 1,360.83, 1,878.03 and 771.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.83 : 1,878.03 = 771.47 : x
2. Step 2: Convert to fraction form
   1,360.83/1,878.03 = 771.47/x
3. Step 3: Cross multiply
   1,360.83x = 1,878.03 × 771.47
4. Step 4: Simplify right side
   1,360.83x = 1,448,843.80
5. Step 5: Solve for x
   x = 1,448,843.80/1,360.83
6. Step 6: Final answer
   x = 1,064.68