Finding the Fourth Proportional to 1,397.35, 1,928.06 and 837.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.35 : 1,928.06 = 837.67 : x
2. Step 2: Convert to fraction form
   1,397.35/1,928.06 = 837.67/x
3. Step 3: Cross multiply
   1,397.35x = 1,928.06 × 837.67
4. Step 4: Simplify right side
   1,397.35x = 1,615,073.83
5. Step 5: Solve for x
   x = 1,615,073.83/1,397.35
6. Step 6: Final answer
   x = 1,155.81