Finding the Fourth Proportional to 21,412.59, 32,147.92 and 12,059.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,412.59 : 32,147.92 = 12,059.12 : x
2. Step 2: Convert to fraction form
   21,412.59/32,147.92 = 12,059.12/x
3. Step 3: Cross multiply
   21,412.59x = 32,147.92 × 12,059.12
4. Step 4: Simplify right side
   21,412.59x = 387,675,625.03
5. Step 5: Solve for x
   x = 387,675,625.03/21,412.59
6. Step 6: Final answer
   x = 18,105.03