Finding the Fourth Proportional to 1,054.72, 1,582.35 and 758.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.72 : 1,582.35 = 758.57 : x
2. Step 2: Convert to fraction form
   1,054.72/1,582.35 = 758.57/x
3. Step 3: Cross multiply
   1,054.72x = 1,582.35 × 758.57
4. Step 4: Simplify right side
   1,054.72x = 1,200,323.24
5. Step 5: Solve for x
   x = 1,200,323.24/1,054.72
6. Step 6: Final answer
   x = 1,138.05