Finding the Fourth Proportional to 10,816.78, 16,225.14 and 2,608.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,816.78 : 16,225.14 = 2,608.78 : x
2. Step 2: Convert to fraction form
   10,816.78/16,225.14 = 2,608.78/x
3. Step 3: Cross multiply
   10,816.78x = 16,225.14 × 2,608.78
4. Step 4: Simplify right side
   10,816.78x = 42,327,820.73
5. Step 5: Solve for x
   x = 42,327,820.73/10,816.78
6. Step 6: Final answer
   x = 3,913.16