Finding the Fourth Proportional to 21,429.34, 32,134.99 and 8,100.08

Step by Step Solution

1. Step 1: Write the proportion equation
   21,429.34 : 32,134.99 = 8,100.08 : x
2. Step 2: Convert to fraction form
   21,429.34/32,134.99 = 8,100.08/x
3. Step 3: Cross multiply
   21,429.34x = 32,134.99 × 8,100.08
4. Step 4: Simplify right side
   21,429.34x = 260,296,049.89
5. Step 5: Solve for x
   x = 260,296,049.89/21,429.34
6. Step 6: Final answer
   x = 12,146.71