Finding the Fourth Proportional to 1,396.91, 1,927.33 and 807.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.91 : 1,927.33 = 807.35 : x
2. Step 2: Convert to fraction form
   1,396.91/1,927.33 = 807.35/x
3. Step 3: Cross multiply
   1,396.91x = 1,927.33 × 807.35
4. Step 4: Simplify right side
   1,396.91x = 1,556,018.22
5. Step 5: Solve for x
   x = 1,556,018.22/1,396.91
6. Step 6: Final answer
   x = 1,113.90