Finding the Fourth Proportional to 21,514.68, 32,111.51 and 20,989.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,514.68 : 32,111.51 = 20,989.72 : x
2. Step 2: Convert to fraction form
   21,514.68/32,111.51 = 20,989.72/x
3. Step 3: Cross multiply
   21,514.68x = 32,111.51 × 20,989.72
4. Step 4: Simplify right side
   21,514.68x = 674,011,603.68
5. Step 5: Solve for x
   x = 674,011,603.68/21,514.68
6. Step 6: Final answer
   x = 31,327.99