Finding the Fourth Proportional to 21,537.32, 29,724.17 and 12,105.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,537.32 : 29,724.17 = 12,105.88 : x
2. Step 2: Convert to fraction form
   21,537.32/29,724.17 = 12,105.88/x
3. Step 3: Cross multiply
   21,537.32x = 29,724.17 × 12,105.88
4. Step 4: Simplify right side
   21,537.32x = 359,837,100.28
5. Step 5: Solve for x
   x = 359,837,100.28/21,537.32
6. Step 6: Final answer
   x = 16,707.61