Finding the Fourth Proportional to 2,411.90, 3,617.81 and 768.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,411.90 : 3,617.81 = 768.42 : x
2. Step 2: Convert to fraction form
   2,411.90/3,617.81 = 768.42/x
3. Step 3: Cross multiply
   2,411.90x = 3,617.81 × 768.42
4. Step 4: Simplify right side
   2,411.90x = 2,779,997.56
5. Step 5: Solve for x
   x = 2,779,997.56/2,411.90
6. Step 6: Final answer
   x = 1,152.62