Finding the Fourth Proportional to 2,520.52, 3,780.74 and 765.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.52 : 3,780.74 = 765.52 : x
2. Step 2: Convert to fraction form
   2,520.52/3,780.74 = 765.52/x
3. Step 3: Cross multiply
   2,520.52x = 3,780.74 × 765.52
4. Step 4: Simplify right side
   2,520.52x = 2,894,224.55
5. Step 5: Solve for x
   x = 2,894,224.55/2,520.52
6. Step 6: Final answer
   x = 1,148.27