Finding the Fourth Proportional to 20,061.58, 27,680.68 and 12,103.69

Step by Step Solution

1. Step 1: Write the proportion equation
   20,061.58 : 27,680.68 = 12,103.69 : x
2. Step 2: Convert to fraction form
   20,061.58/27,680.68 = 12,103.69/x
3. Step 3: Cross multiply
   20,061.58x = 27,680.68 × 12,103.69
4. Step 4: Simplify right side
   20,061.58x = 335,038,369.71
5. Step 5: Solve for x
   x = 335,038,369.71/20,061.58
6. Step 6: Final answer
   x = 16,700.50