Finding the Fourth Proportional to 21,086.37, 29,123.10 and 14,360.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,086.37 : 29,123.10 = 14,360.31 : x
2. Step 2: Convert to fraction form
   21,086.37/29,123.10 = 14,360.31/x
3. Step 3: Cross multiply
   21,086.37x = 29,123.10 × 14,360.31
4. Step 4: Simplify right side
   21,086.37x = 418,216,744.16
5. Step 5: Solve for x
   x = 418,216,744.16/21,086.37
6. Step 6: Final answer
   x = 19,833.51