Finding the Fourth Proportional to 20,105.61, 27,744.71 and 11,152.92

Step by Step Solution

1. Step 1: Write the proportion equation
   20,105.61 : 27,744.71 = 11,152.92 : x
2. Step 2: Convert to fraction form
   20,105.61/27,744.71 = 11,152.92/x
3. Step 3: Cross multiply
   20,105.61x = 27,744.71 × 11,152.92
4. Step 4: Simplify right side
   20,105.61x = 309,434,475.29
5. Step 5: Solve for x
   x = 309,434,475.29/20,105.61
6. Step 6: Final answer
   x = 15,390.45