Finding the Fourth Proportional to 1,361.98, 1,878.96 and 919.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.98 : 1,878.96 = 919.12 : x
2. Step 2: Convert to fraction form
   1,361.98/1,878.96 = 919.12/x
3. Step 3: Cross multiply
   1,361.98x = 1,878.96 × 919.12
4. Step 4: Simplify right side
   1,361.98x = 1,726,989.72
5. Step 5: Solve for x
   x = 1,726,989.72/1,361.98
6. Step 6: Final answer
   x = 1,268.00