Finding the Fourth Proportional to 2,231.02, 3,345.72 and 749.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.02 : 3,345.72 = 749.80 : x
2. Step 2: Convert to fraction form
   2,231.02/3,345.72 = 749.80/x
3. Step 3: Cross multiply
   2,231.02x = 3,345.72 × 749.80
4. Step 4: Simplify right side
   2,231.02x = 2,508,620.86
5. Step 5: Solve for x
   x = 2,508,620.86/2,231.02
6. Step 6: Final answer
   x = 1,124.43