Finding the Fourth Proportional to 1,397.54, 1,928.39 and 807.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.54 : 1,928.39 = 807.96 : x
2. Step 2: Convert to fraction form
   1,397.54/1,928.39 = 807.96/x
3. Step 3: Cross multiply
   1,397.54x = 1,928.39 × 807.96
4. Step 4: Simplify right side
   1,397.54x = 1,558,061.98
5. Step 5: Solve for x
   x = 1,558,061.98/1,397.54
6. Step 6: Final answer
   x = 1,114.86