Finding the Fourth Proportional to 1,479.69, 2,220.89 and 749.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.69 : 2,220.89 = 749.77 : x
2. Step 2: Convert to fraction form
   1,479.69/2,220.89 = 749.77/x
3. Step 3: Cross multiply
   1,479.69x = 2,220.89 × 749.77
4. Step 4: Simplify right side
   1,479.69x = 1,665,147.39
5. Step 5: Solve for x
   x = 1,665,147.39/1,479.69
6. Step 6: Final answer
   x = 1,125.34