Finding the Fourth Proportional to 3,423.60, 4,722.89 and 2,164.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,423.60 : 4,722.89 = 2,164.05 : x
2. Step 2: Convert to fraction form
   3,423.60/4,722.89 = 2,164.05/x
3. Step 3: Cross multiply
   3,423.60x = 4,722.89 × 2,164.05
4. Step 4: Simplify right side
   3,423.60x = 10,220,570.10
5. Step 5: Solve for x
   x = 10,220,570.10/3,423.60
6. Step 6: Final answer
   x = 2,985.33