Finding the Fourth Proportional to 1,374.31, 2,061.49 and 757.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,374.31 : 2,061.49 = 757.90 : x
2. Step 2: Convert to fraction form
   1,374.31/2,061.49 = 757.90/x
3. Step 3: Cross multiply
   1,374.31x = 2,061.49 × 757.90
4. Step 4: Simplify right side
   1,374.31x = 1,562,403.27
5. Step 5: Solve for x
   x = 1,562,403.27/1,374.31
6. Step 6: Final answer
   x = 1,136.86