Finding the Fourth Proportional to 1,143.52, 1,572.72 and 922

Step by Step Solution

1. Step 1: Write the proportion equation
   1,143.52 : 1,572.72 = 922 : x
2. Step 2: Convert to fraction form
   1,143.52/1,572.72 = 922/x
3. Step 3: Cross multiply
   1,143.52x = 1,572.72 × 922
4. Step 4: Simplify right side
   1,143.52x = 1,450,047.84
5. Step 5: Solve for x
   x = 1,450,047.84/1,143.52
6. Step 6: Final answer
   x = 1,268.06