Finding the Fourth Proportional to 5,615.66, 8,423.72 and 2,105.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,615.66 : 8,423.72 = 2,105.30 : x
2. Step 2: Convert to fraction form
   5,615.66/8,423.72 = 2,105.30/x
3. Step 3: Cross multiply
   5,615.66x = 8,423.72 × 2,105.30
4. Step 4: Simplify right side
   5,615.66x = 17,734,457.72
5. Step 5: Solve for x
   x = 17,734,457.72/5,615.66
6. Step 6: Final answer
   x = 3,158.04