Finding the Fourth Proportional to 2,242.54, 3,363.78 and 781.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,242.54 : 3,363.78 = 781.69 : x
2. Step 2: Convert to fraction form
   2,242.54/3,363.78 = 781.69/x
3. Step 3: Cross multiply
   2,242.54x = 3,363.78 × 781.69
4. Step 4: Simplify right side
   2,242.54x = 2,629,421.55
5. Step 5: Solve for x
   x = 2,629,421.55/2,242.54
6. Step 6: Final answer
   x = 1,172.52