Finding the Fourth Proportional to 2,406.64, 3,608.88 and 762.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,406.64 : 3,608.88 = 762.88 : x
2. Step 2: Convert to fraction form
   2,406.64/3,608.88 = 762.88/x
3. Step 3: Cross multiply
   2,406.64x = 3,608.88 × 762.88
4. Step 4: Simplify right side
   2,406.64x = 2,753,142.37
5. Step 5: Solve for x
   x = 2,753,142.37/2,406.64
6. Step 6: Final answer
   x = 1,143.98