Finding the Fourth Proportional to 1,920.56, 2,650.72 and 1,123.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.56 : 2,650.72 = 1,123.96 : x
2. Step 2: Convert to fraction form
   1,920.56/2,650.72 = 1,123.96/x
3. Step 3: Cross multiply
   1,920.56x = 2,650.72 × 1,123.96
4. Step 4: Simplify right side
   1,920.56x = 2,979,303.25
5. Step 5: Solve for x
   x = 2,979,303.25/1,920.56
6. Step 6: Final answer
   x = 1,551.27