Finding the Fourth Proportional to 1,351.33, 1,863.51 and 820.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,351.33 : 1,863.51 = 820.29 : x
2. Step 2: Convert to fraction form
   1,351.33/1,863.51 = 820.29/x
3. Step 3: Cross multiply
   1,351.33x = 1,863.51 × 820.29
4. Step 4: Simplify right side
   1,351.33x = 1,528,622.53
5. Step 5: Solve for x
   x = 1,528,622.53/1,351.33
6. Step 6: Final answer
   x = 1,131.20