Finding the Fourth Proportional to 1,123.36, 1,552.16 and 926.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.36 : 1,552.16 = 926.72 : x
2. Step 2: Convert to fraction form
   1,123.36/1,552.16 = 926.72/x
3. Step 3: Cross multiply
   1,123.36x = 1,552.16 × 926.72
4. Step 4: Simplify right side
   1,123.36x = 1,438,417.72
5. Step 5: Solve for x
   x = 1,438,417.72/1,123.36
6. Step 6: Final answer
   x = 1,280.46