Finding the Fourth Proportional to 1,361.32, 1,878.39 and 801.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.32 : 1,878.39 = 801.90 : x
2. Step 2: Convert to fraction form
   1,361.32/1,878.39 = 801.90/x
3. Step 3: Cross multiply
   1,361.32x = 1,878.39 × 801.90
4. Step 4: Simplify right side
   1,361.32x = 1,506,280.94
5. Step 5: Solve for x
   x = 1,506,280.94/1,361.32
6. Step 6: Final answer
   x = 1,106.49