Finding the Fourth Proportional to 1,320.27, 1,820.31 and 847.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.27 : 1,820.31 = 847.33 : x
2. Step 2: Convert to fraction form
   1,320.27/1,820.31 = 847.33/x
3. Step 3: Cross multiply
   1,320.27x = 1,820.31 × 847.33
4. Step 4: Simplify right side
   1,320.27x = 1,542,394.17
5. Step 5: Solve for x
   x = 1,542,394.17/1,320.27
6. Step 6: Final answer
   x = 1,168.25