Finding the Fourth Proportional to 2,775.30, 3,816.09 and 2,660.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,775.30 : 3,816.09 = 2,660.10 : x
2. Step 2: Convert to fraction form
   2,775.30/3,816.09 = 2,660.10/x
3. Step 3: Cross multiply
   2,775.30x = 3,816.09 × 2,660.10
4. Step 4: Simplify right side
   2,775.30x = 10,151,181.01
5. Step 5: Solve for x
   x = 10,151,181.01/2,775.30
6. Step 6: Final answer
   x = 3,657.69