Finding the Fourth Proportional to 25,990.72, 38,958.72 and 11,196.16

Step by Step Solution

1. Step 1: Write the proportion equation
   25,990.72 : 38,958.72 = 11,196.16 : x
2. Step 2: Convert to fraction form
   25,990.72/38,958.72 = 11,196.16/x
3. Step 3: Cross multiply
   25,990.72x = 38,958.72 × 11,196.16
4. Step 4: Simplify right side
   25,990.72x = 436,188,062.52
5. Step 5: Solve for x
   x = 436,188,062.52/25,990.72
6. Step 6: Final answer
   x = 16,782.45