Finding the Fourth Proportional to 1,479.72, 2,221.63 and 749.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.72 : 2,221.63 = 749.81 : x
2. Step 2: Convert to fraction form
   1,479.72/2,221.63 = 749.81/x
3. Step 3: Cross multiply
   1,479.72x = 2,221.63 × 749.81
4. Step 4: Simplify right side
   1,479.72x = 1,665,791.57
5. Step 5: Solve for x
   x = 1,665,791.57/1,479.72
6. Step 6: Final answer
   x = 1,125.75