Finding the Fourth Proportional to 2,815.30, 3,901.54 and 2,775.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,815.30 : 3,901.54 = 2,775.67 : x
2. Step 2: Convert to fraction form
   2,815.30/3,901.54 = 2,775.67/x
3. Step 3: Cross multiply
   2,815.30x = 3,901.54 × 2,775.67
4. Step 4: Simplify right side
   2,815.30x = 10,829,387.53
5. Step 5: Solve for x
   x = 10,829,387.53/2,815.30
6. Step 6: Final answer
   x = 3,846.62