Finding the Fourth Proportional to 21,655.89, 32,494.61 and 12,162.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,655.89 : 32,494.61 = 12,162.32 : x
2. Step 2: Convert to fraction form
   21,655.89/32,494.61 = 12,162.32/x
3. Step 3: Cross multiply
   21,655.89x = 32,494.61 × 12,162.32
4. Step 4: Simplify right side
   21,655.89x = 395,209,956.74
5. Step 5: Solve for x
   x = 395,209,956.74/21,655.89
6. Step 6: Final answer
   x = 18,249.54