Finding the Fourth Proportional to 6,090.12, 8,402.72 and 3,668.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,090.12 : 8,402.72 = 3,668.20 : x
2. Step 2: Convert to fraction form
   6,090.12/8,402.72 = 3,668.20/x
3. Step 3: Cross multiply
   6,090.12x = 8,402.72 × 3,668.20
4. Step 4: Simplify right side
   6,090.12x = 30,822,857.50
5. Step 5: Solve for x
   x = 30,822,857.50/6,090.12
6. Step 6: Final answer
   x = 5,061.12