Finding the Fourth Proportional to 8,111.46, 12,168.60 and 2,564.70

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.46 : 12,168.60 = 2,564.70 : x
2. Step 2: Convert to fraction form
   8,111.46/12,168.60 = 2,564.70/x
3. Step 3: Cross multiply
   8,111.46x = 12,168.60 × 2,564.70
4. Step 4: Simplify right side
   8,111.46x = 31,208,808.42
5. Step 5: Solve for x
   x = 31,208,808.42/8,111.46
6. Step 6: Final answer
   x = 3,847.50