Finding the Fourth Proportional to 21,150.96, 29,187.72 and 11,719.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,150.96 : 29,187.72 = 11,719.32 : x
2. Step 2: Convert to fraction form
   21,150.96/29,187.72 = 11,719.32/x
3. Step 3: Cross multiply
   21,150.96x = 29,187.72 × 11,719.32
4. Step 4: Simplify right side
   21,150.96x = 342,060,230.75
5. Step 5: Solve for x
   x = 342,060,230.75/21,150.96
6. Step 6: Final answer
   x = 16,172.33