Finding the Fourth Proportional to 1,360.55, 1,877.41 and 771.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.55 : 1,877.41 = 771.09 : x
2. Step 2: Convert to fraction form
   1,360.55/1,877.41 = 771.09/x
3. Step 3: Cross multiply
   1,360.55x = 1,877.41 × 771.09
4. Step 4: Simplify right side
   1,360.55x = 1,447,652.08
5. Step 5: Solve for x
   x = 1,447,652.08/1,360.55
6. Step 6: Final answer
   x = 1,064.02