Finding the Fourth Proportional to 1,351.55, 1,865.34 and 820.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,351.55 : 1,865.34 = 820.46 : x
2. Step 2: Convert to fraction form
   1,351.55/1,865.34 = 820.46/x
3. Step 3: Cross multiply
   1,351.55x = 1,865.34 × 820.46
4. Step 4: Simplify right side
   1,351.55x = 1,530,441.52
5. Step 5: Solve for x
   x = 1,530,441.52/1,351.55
6. Step 6: Final answer
   x = 1,132.36