Finding the Fourth Proportional to 1,290.56, 1,934.72 and 743.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.56 : 1,934.72 = 743.04 : x
2. Step 2: Convert to fraction form
   1,290.56/1,934.72 = 743.04/x
3. Step 3: Cross multiply
   1,290.56x = 1,934.72 × 743.04
4. Step 4: Simplify right side
   1,290.56x = 1,437,574.35
5. Step 5: Solve for x
   x = 1,437,574.35/1,290.56
6. Step 6: Final answer
   x = 1,113.92