Finding the Fourth Proportional to 20,105.16, 30,168.90 and 10,246.20

Step by Step Solution

1. Step 1: Write the proportion equation
   20,105.16 : 30,168.90 = 10,246.20 : x
2. Step 2: Convert to fraction form
   20,105.16/30,168.90 = 10,246.20/x
3. Step 3: Cross multiply
   20,105.16x = 30,168.90 × 10,246.20
4. Step 4: Simplify right side
   20,105.16x = 309,116,583.18
5. Step 5: Solve for x
   x = 309,116,583.18/20,105.16
6. Step 6: Final answer
   x = 15,374.99