Finding the Fourth Proportional to 1,397.59, 1,928.50 and 837.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.59 : 1,928.50 = 837.99 : x
2. Step 2: Convert to fraction form
   1,397.59/1,928.50 = 837.99/x
3. Step 3: Cross multiply
   1,397.59x = 1,928.50 × 837.99
4. Step 4: Simplify right side
   1,397.59x = 1,616,061.62
5. Step 5: Solve for x
   x = 1,616,061.62/1,397.59
6. Step 6: Final answer
   x = 1,156.32