Finding the Fourth Proportional to 20,830.96, 31,236.72 and 12,068.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,830.96 : 31,236.72 = 12,068.38 : x
2. Step 2: Convert to fraction form
   20,830.96/31,236.72 = 12,068.38/x
3. Step 3: Cross multiply
   20,830.96x = 31,236.72 × 12,068.38
4. Step 4: Simplify right side
   20,830.96x = 376,976,606.91
5. Step 5: Solve for x
   x = 376,976,606.91/20,830.96
6. Step 6: Final answer
   x = 18,096.94