Finding the Fourth Proportional to 20,086.61, 30,118.62 and 8,237.12

Step by Step Solution

1. Step 1: Write the proportion equation
   20,086.61 : 30,118.62 = 8,237.12 : x
2. Step 2: Convert to fraction form
   20,086.61/30,118.62 = 8,237.12/x
3. Step 3: Cross multiply
   20,086.61x = 30,118.62 × 8,237.12
4. Step 4: Simplify right side
   20,086.61x = 248,090,687.17
5. Step 5: Solve for x
   x = 248,090,687.17/20,086.61
6. Step 6: Final answer
   x = 12,351.05