Finding the Fourth Proportional to 1,397.25, 1,927.73 and 807.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.25 : 1,927.73 = 807.57 : x
2. Step 2: Convert to fraction form
   1,397.25/1,927.73 = 807.57/x
3. Step 3: Cross multiply
   1,397.25x = 1,927.73 × 807.57
4. Step 4: Simplify right side
   1,397.25x = 1,556,778.94
5. Step 5: Solve for x
   x = 1,556,778.94/1,397.25
6. Step 6: Final answer
   x = 1,114.17