Finding the Fourth Proportional to 2,618.06, 3,926.12 and 768.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.06 : 3,926.12 = 768.69 : x
2. Step 2: Convert to fraction form
   2,618.06/3,926.12 = 768.69/x
3. Step 3: Cross multiply
   2,618.06x = 3,926.12 × 768.69
4. Step 4: Simplify right side
   2,618.06x = 3,017,965.34
5. Step 5: Solve for x
   x = 3,017,965.34/2,618.06
6. Step 6: Final answer
   x = 1,152.75