Finding the Fourth Proportional to 2,796.30, 3,858.18 and 1,912.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,796.30 : 3,858.18 = 1,912.38 : x
2. Step 2: Convert to fraction form
   2,796.30/3,858.18 = 1,912.38/x
3. Step 3: Cross multiply
   2,796.30x = 3,858.18 × 1,912.38
4. Step 4: Simplify right side
   2,796.30x = 7,378,306.27
5. Step 5: Solve for x
   x = 7,378,306.27/2,796.30
6. Step 6: Final answer
   x = 2,638.60