Finding the Fourth Proportional to 2,778.57, 3,835.82 and 2,147.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,778.57 : 3,835.82 = 2,147.67 : x
2. Step 2: Convert to fraction form
   2,778.57/3,835.82 = 2,147.67/x
3. Step 3: Cross multiply
   2,778.57x = 3,835.82 × 2,147.67
4. Step 4: Simplify right side
   2,778.57x = 8,238,068.83
5. Step 5: Solve for x
   x = 8,238,068.83/2,778.57
6. Step 6: Final answer
   x = 2,964.86