Finding the Fourth Proportional to 2,607.45, 3,906.61 and 2,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.45 : 3,906.61 = 2,171.50 : x
2. Step 2: Convert to fraction form
   2,607.45/3,906.61 = 2,171.50/x
3. Step 3: Cross multiply
   2,607.45x = 3,906.61 × 2,171.50
4. Step 4: Simplify right side
   2,607.45x = 8,483,222.61
5. Step 5: Solve for x
   x = 8,483,222.61/2,607.45
6. Step 6: Final answer
   x = 3,253.46