Finding the Fourth Proportional to 2,499.78, 3,750.29 and 744.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.78 : 3,750.29 = 744.78 : x
2. Step 2: Convert to fraction form
   2,499.78/3,750.29 = 744.78/x
3. Step 3: Cross multiply
   2,499.78x = 3,750.29 × 744.78
4. Step 4: Simplify right side
   2,499.78x = 2,793,142.85
5. Step 5: Solve for x
   x = 2,793,142.85/2,499.78
6. Step 6: Final answer
   x = 1,117.36