Finding the Fourth Proportional to 1,361.98, 1,878.89 and 920.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.98 : 1,878.89 = 920.03 : x
2. Step 2: Convert to fraction form
   1,361.98/1,878.89 = 920.03/x
3. Step 3: Cross multiply
   1,361.98x = 1,878.89 × 920.03
4. Step 4: Simplify right side
   1,361.98x = 1,728,635.26
5. Step 5: Solve for x
   x = 1,728,635.26/1,361.98
6. Step 6: Final answer
   x = 1,269.21