Finding the Fourth Proportional to 2,412.17, 3,618.69 and 768.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,412.17 : 3,618.69 = 768.54 : x
2. Step 2: Convert to fraction form
   2,412.17/3,618.69 = 768.54/x
3. Step 3: Cross multiply
   2,412.17x = 3,618.69 × 768.54
4. Step 4: Simplify right side
   2,412.17x = 2,781,108.01
5. Step 5: Solve for x
   x = 2,781,108.01/2,412.17
6. Step 6: Final answer
   x = 1,152.95