Finding the Fourth Proportional to 8,622.10, 12,933.42 and 2,778.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,622.10 : 12,933.42 = 2,778.76 : x
2. Step 2: Convert to fraction form
   8,622.10/12,933.42 = 2,778.76/x
3. Step 3: Cross multiply
   8,622.10x = 12,933.42 × 2,778.76
4. Step 4: Simplify right side
   8,622.10x = 35,938,870.16
5. Step 5: Solve for x
   x = 35,938,870.16/8,622.10
6. Step 6: Final answer
   x = 4,168.23