Finding the Fourth Proportional to 1,361.40, 1,877.24 and 1,077.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.40 : 1,877.24 = 1,077.32 : x
2. Step 2: Convert to fraction form
   1,361.40/1,877.24 = 1,077.32/x
3. Step 3: Cross multiply
   1,361.40x = 1,877.24 × 1,077.32
4. Step 4: Simplify right side
   1,361.40x = 2,022,388.20
5. Step 5: Solve for x
   x = 2,022,388.20/1,361.40
6. Step 6: Final answer
   x = 1,485.52