Finding the Fourth Proportional to 2,776.98, 3,830.47 and 2,112.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,776.98 : 3,830.47 = 2,112.37 : x
2. Step 2: Convert to fraction form
   2,776.98/3,830.47 = 2,112.37/x
3. Step 3: Cross multiply
   2,776.98x = 3,830.47 × 2,112.37
4. Step 4: Simplify right side
   2,776.98x = 8,091,369.91
5. Step 5: Solve for x
   x = 8,091,369.91/2,776.98
6. Step 6: Final answer
   x = 2,913.73