Finding the Fourth Proportional to 21,086.54, 29,098.56 and 12,134.36

Step by Step Solution

1. Step 1: Write the proportion equation
   21,086.54 : 29,098.56 = 12,134.36 : x
2. Step 2: Convert to fraction form
   21,086.54/29,098.56 = 12,134.36/x
3. Step 3: Cross multiply
   21,086.54x = 29,098.56 × 12,134.36
4. Step 4: Simplify right side
   21,086.54x = 353,092,520.77
5. Step 5: Solve for x
   x = 353,092,520.77/21,086.54
6. Step 6: Final answer
   x = 16,744.93