Finding the Fourth Proportional to 2,779.90, 3,853.81 and 2,631.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,779.90 : 3,853.81 = 2,631.94 : x
2. Step 2: Convert to fraction form
   2,779.90/3,853.81 = 2,631.94/x
3. Step 3: Cross multiply
   2,779.90x = 3,853.81 × 2,631.94
4. Step 4: Simplify right side
   2,779.90x = 10,142,996.69
5. Step 5: Solve for x
   x = 10,142,996.69/2,779.90
6. Step 6: Final answer
   x = 3,648.69