Finding the Fourth Proportional to 21,453.24, 29,587.90 and 15,100.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,453.24 : 29,587.90 = 15,100.86 : x
2. Step 2: Convert to fraction form
   21,453.24/29,587.90 = 15,100.86/x
3. Step 3: Cross multiply
   21,453.24x = 29,587.90 × 15,100.86
4. Step 4: Simplify right side
   21,453.24x = 446,802,735.59
5. Step 5: Solve for x
   x = 446,802,735.59/21,453.24
6. Step 6: Final answer
   x = 20,826.82