Finding the Fourth Proportional to 1,361.50, 1,878.90 and 740.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.50 : 1,878.90 = 740.50 : x
2. Step 2: Convert to fraction form
   1,361.50/1,878.90 = 740.50/x
3. Step 3: Cross multiply
   1,361.50x = 1,878.90 × 740.50
4. Step 4: Simplify right side
   1,361.50x = 1,391,325.45
5. Step 5: Solve for x
   x = 1,391,325.45/1,361.50
6. Step 6: Final answer
   x = 1,021.91