Finding the Fourth Proportional to 16,111.72, 22,192.74 and 11,387.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,111.72 : 22,192.74 = 11,387.88 : x
2. Step 2: Convert to fraction form
   16,111.72/22,192.74 = 11,387.88/x
3. Step 3: Cross multiply
   16,111.72x = 22,192.74 × 11,387.88
4. Step 4: Simplify right side
   16,111.72x = 252,728,259.99
5. Step 5: Solve for x
   x = 252,728,259.99/16,111.72
6. Step 6: Final answer
   x = 15,685.99