Finding the Fourth Proportional to 1,361.37, 1,878.74 and 771.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.37 : 1,878.74 = 771.93 : x
2. Step 2: Convert to fraction form
   1,361.37/1,878.74 = 771.93/x
3. Step 3: Cross multiply
   1,361.37x = 1,878.74 × 771.93
4. Step 4: Simplify right side
   1,361.37x = 1,450,251.91
5. Step 5: Solve for x
   x = 1,450,251.91/1,361.37
6. Step 6: Final answer
   x = 1,065.29