Finding the Fourth Proportional to 1,396.75, 1,927.98 and 837.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.75 : 1,927.98 = 837.40 : x
2. Step 2: Convert to fraction form
   1,396.75/1,927.98 = 837.40/x
3. Step 3: Cross multiply
   1,396.75x = 1,927.98 × 837.40
4. Step 4: Simplify right side
   1,396.75x = 1,614,490.45
5. Step 5: Solve for x
   x = 1,614,490.45/1,396.75
6. Step 6: Final answer
   x = 1,155.89