Finding the Fourth Proportional to 20,900.82, 28,842.69 and 11,948.82

Step by Step Solution

1. Step 1: Write the proportion equation
   20,900.82 : 28,842.69 = 11,948.82 : x
2. Step 2: Convert to fraction form
   20,900.82/28,842.69 = 11,948.82/x
3. Step 3: Cross multiply
   20,900.82x = 28,842.69 × 11,948.82
4. Step 4: Simplify right side
   20,900.82x = 344,636,111.13
5. Step 5: Solve for x
   x = 344,636,111.13/20,900.82
6. Step 6: Final answer
   x = 16,489.12