Finding the Fourth Proportional to 2,522.39, 3,783.78 and 767.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,522.39 : 3,783.78 = 767.55 : x
2. Step 2: Convert to fraction form
   2,522.39/3,783.78 = 767.55/x
3. Step 3: Cross multiply
   2,522.39x = 3,783.78 × 767.55
4. Step 4: Simplify right side
   2,522.39x = 2,904,240.34
5. Step 5: Solve for x
   x = 2,904,240.34/2,522.39
6. Step 6: Final answer
   x = 1,151.39