Finding the Fourth Proportional to 1,079.72, 1,616.67 and 749.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.72 : 1,616.67 = 749.98 : x
2. Step 2: Convert to fraction form
   1,079.72/1,616.67 = 749.98/x
3. Step 3: Cross multiply
   1,079.72x = 1,616.67 × 749.98
4. Step 4: Simplify right side
   1,079.72x = 1,212,470.17
5. Step 5: Solve for x
   x = 1,212,470.17/1,079.72
6. Step 6: Final answer
   x = 1,122.95