Finding the Fourth Proportional to 2,411.72, 3,618.12 and 768.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,411.72 : 3,618.12 = 768.16 : x
2. Step 2: Convert to fraction form
   2,411.72/3,618.12 = 768.16/x
3. Step 3: Cross multiply
   2,411.72x = 3,618.12 × 768.16
4. Step 4: Simplify right side
   2,411.72x = 2,779,295.06
5. Step 5: Solve for x
   x = 2,779,295.06/2,411.72
6. Step 6: Final answer
   x = 1,152.41