Finding the Fourth Proportional to 21,411.59, 32,146.42 and 12,058.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,411.59 : 32,146.42 = 12,058.12 : x
2. Step 2: Convert to fraction form
   21,411.59/32,146.42 = 12,058.12/x
3. Step 3: Cross multiply
   21,411.59x = 32,146.42 × 12,058.12
4. Step 4: Simplify right side
   21,411.59x = 387,625,241.75
5. Step 5: Solve for x
   x = 387,625,241.75/21,411.59
6. Step 6: Final answer
   x = 18,103.52