Finding the Fourth Proportional to 2,777.45, 3,828.82 and 2,113.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,777.45 : 3,828.82 = 2,113.15 : x
2. Step 2: Convert to fraction form
   2,777.45/3,828.82 = 2,113.15/x
3. Step 3: Cross multiply
   2,777.45x = 3,828.82 × 2,113.15
4. Step 4: Simplify right side
   2,777.45x = 8,090,870.98
5. Step 5: Solve for x
   x = 8,090,870.98/2,777.45
6. Step 6: Final answer
   x = 2,913.06