Finding the Fourth Proportional to 21,323.76, 29,426.72 and 11,892.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,323.76 : 29,426.72 = 11,892.32 : x
2. Step 2: Convert to fraction form
   21,323.76/29,426.72 = 11,892.32/x
3. Step 3: Cross multiply
   21,323.76x = 29,426.72 × 11,892.32
4. Step 4: Simplify right side
   21,323.76x = 349,951,764.20
5. Step 5: Solve for x
   x = 349,951,764.20/21,323.76
6. Step 6: Final answer
   x = 16,411.35