Finding the Fourth Proportional to 2,520.34, 3,780.34 and 765.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.34 : 3,780.34 = 765.24 : x
2. Step 2: Convert to fraction form
   2,520.34/3,780.34 = 765.24/x
3. Step 3: Cross multiply
   2,520.34x = 3,780.34 × 765.24
4. Step 4: Simplify right side
   2,520.34x = 2,892,867.38
5. Step 5: Solve for x
   x = 2,892,867.38/2,520.34
6. Step 6: Final answer
   x = 1,147.81