Finding the Fourth Proportional to 20,861, 31,291.16 and 5,066.16

Step by Step Solution

1. Step 1: Write the proportion equation
   20,861 : 31,291.16 = 5,066.16 : x
2. Step 2: Convert to fraction form
   20,861/31,291.16 = 5,066.16/x
3. Step 3: Cross multiply
   20,861x = 31,291.16 × 5,066.16
4. Step 4: Simplify right side
   20,861x = 158,526,023.15
5. Step 5: Solve for x
   x = 158,526,023.15/20,861
6. Step 6: Final answer
   x = 7,599.16