Finding the Fourth Proportional to 2,152.58, 3,228.76 and 765.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.58 : 3,228.76 = 765.92 : x
2. Step 2: Convert to fraction form
   2,152.58/3,228.76 = 765.92/x
3. Step 3: Cross multiply
   2,152.58x = 3,228.76 × 765.92
4. Step 4: Simplify right side
   2,152.58x = 2,472,980.89
5. Step 5: Solve for x
   x = 2,472,980.89/2,152.58
6. Step 6: Final answer
   x = 1,148.85