Finding the Fourth Proportional to 3,509.10, 4,842.18 and 2,164.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,509.10 : 4,842.18 = 2,164.50 : x
2. Step 2: Convert to fraction form
   3,509.10/4,842.18 = 2,164.50/x
3. Step 3: Cross multiply
   3,509.10x = 4,842.18 × 2,164.50
4. Step 4: Simplify right side
   3,509.10x = 10,480,898.61
5. Step 5: Solve for x
   x = 10,480,898.61/3,509.10
6. Step 6: Final answer
   x = 2,986.78