Finding the Fourth Proportional to 21,835.50, 30,134.55 and 12,146.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,835.50 : 30,134.55 = 12,146.10 : x
2. Step 2: Convert to fraction form
   21,835.50/30,134.55 = 12,146.10/x
3. Step 3: Cross multiply
   21,835.50x = 30,134.55 × 12,146.10
4. Step 4: Simplify right side
   21,835.50x = 366,017,257.76
5. Step 5: Solve for x
   x = 366,017,257.76/21,835.50
6. Step 6: Final answer
   x = 16,762.49