Finding the Fourth Proportional to 2,209.93, 3,315.39 and 749.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.93 : 3,315.39 = 749.05 : x
2. Step 2: Convert to fraction form
   2,209.93/3,315.39 = 749.05/x
3. Step 3: Cross multiply
   2,209.93x = 3,315.39 × 749.05
4. Step 4: Simplify right side
   2,209.93x = 2,483,392.88
5. Step 5: Solve for x
   x = 2,483,392.88/2,209.93
6. Step 6: Final answer
   x = 1,123.74