Finding the Fourth Proportional to 1,397.46, 1,928.42 and 837.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.46 : 1,928.42 = 837.82 : x
2. Step 2: Convert to fraction form
   1,397.46/1,928.42 = 837.82/x
3. Step 3: Cross multiply
   1,397.46x = 1,928.42 × 837.82
4. Step 4: Simplify right side
   1,397.46x = 1,615,674.92
5. Step 5: Solve for x
   x = 1,615,674.92/1,397.46
6. Step 6: Final answer
   x = 1,156.15