Finding the Fourth Proportional to 1,078.63, 1,488.03 and 747.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.63 : 1,488.03 = 747.74 : x
2. Step 2: Convert to fraction form
   1,078.63/1,488.03 = 747.74/x
3. Step 3: Cross multiply
   1,078.63x = 1,488.03 × 747.74
4. Step 4: Simplify right side
   1,078.63x = 1,112,659.55
5. Step 5: Solve for x
   x = 1,112,659.55/1,078.63
6. Step 6: Final answer
   x = 1,031.55