Finding the Fourth Proportional to 2,615.46, 3,923.68 and 766.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.46 : 3,923.68 = 766.58 : x
2. Step 2: Convert to fraction form
   2,615.46/3,923.68 = 766.58/x
3. Step 3: Cross multiply
   2,615.46x = 3,923.68 × 766.58
4. Step 4: Simplify right side
   2,615.46x = 3,007,814.61
5. Step 5: Solve for x
   x = 3,007,814.61/2,615.46
6. Step 6: Final answer
   x = 1,150.01