Finding the Fourth Proportional to 1,123.44, 1,680.72 and 850.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.44 : 1,680.72 = 850.32 : x
2. Step 2: Convert to fraction form
   1,123.44/1,680.72 = 850.32/x
3. Step 3: Cross multiply
   1,123.44x = 1,680.72 × 850.32
4. Step 4: Simplify right side
   1,123.44x = 1,429,149.83
5. Step 5: Solve for x
   x = 1,429,149.83/1,123.44
6. Step 6: Final answer
   x = 1,272.12