Finding the Fourth Proportional to 8,146.72, 12,219.86 and 2,600.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,146.72 : 12,219.86 = 2,600.40 : x
2. Step 2: Convert to fraction form
   8,146.72/12,219.86 = 2,600.40/x
3. Step 3: Cross multiply
   8,146.72x = 12,219.86 × 2,600.40
4. Step 4: Simplify right side
   8,146.72x = 31,776,530.45
5. Step 5: Solve for x
   x = 31,776,530.45/8,146.72
6. Step 6: Final answer
   x = 3,900.53