Finding the Fourth Proportional to 1,361.57, 1,878.96 and 740.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.57 : 1,878.96 = 740.57 : x
2. Step 2: Convert to fraction form
   1,361.57/1,878.96 = 740.57/x
3. Step 3: Cross multiply
   1,361.57x = 1,878.96 × 740.57
4. Step 4: Simplify right side
   1,361.57x = 1,391,488.31
5. Step 5: Solve for x
   x = 1,391,488.31/1,361.57
6. Step 6: Final answer
   x = 1,021.98