Finding the Fourth Proportional to 1,418.02, 1,957.02 and 820.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.02 : 1,957.02 = 820.60 : x
2. Step 2: Convert to fraction form
   1,418.02/1,957.02 = 820.60/x
3. Step 3: Cross multiply
   1,418.02x = 1,957.02 × 820.60
4. Step 4: Simplify right side
   1,418.02x = 1,605,930.61
5. Step 5: Solve for x
   x = 1,605,930.61/1,418.02
6. Step 6: Final answer
   x = 1,132.52