Finding the Fourth Proportional to 1,418.02, 1,956.72 and 820.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.02 : 1,956.72 = 820.42 : x
2. Step 2: Convert to fraction form
   1,418.02/1,956.72 = 820.42/x
3. Step 3: Cross multiply
   1,418.02x = 1,956.72 × 820.42
4. Step 4: Simplify right side
   1,418.02x = 1,605,332.22
5. Step 5: Solve for x
   x = 1,605,332.22/1,418.02
6. Step 6: Final answer
   x = 1,132.09