Finding the Fourth Proportional to 21,725.89, 32,606.15 and 18,642.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,725.89 : 32,606.15 = 18,642.22 : x
2. Step 2: Convert to fraction form
   21,725.89/32,606.15 = 18,642.22/x
3. Step 3: Cross multiply
   21,725.89x = 32,606.15 × 18,642.22
4. Step 4: Simplify right side
   21,725.89x = 607,850,846.93
5. Step 5: Solve for x
   x = 607,850,846.93/21,725.89
6. Step 6: Final answer
   x = 27,978.18