Finding the Fourth Proportional to 1,079.34, 1,488.72 and 747.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.34 : 1,488.72 = 747.92 : x
2. Step 2: Convert to fraction form
   1,079.34/1,488.72 = 747.92/x
3. Step 3: Cross multiply
   1,079.34x = 1,488.72 × 747.92
4. Step 4: Simplify right side
   1,079.34x = 1,113,443.46
5. Step 5: Solve for x
   x = 1,113,443.46/1,079.34
6. Step 6: Final answer
   x = 1,031.60