Finding the Fourth Proportional to 20,697.31, 28,562.91 and 14,658.37

Step by Step Solution

1. Step 1: Write the proportion equation
   20,697.31 : 28,562.91 = 14,658.37 : x
2. Step 2: Convert to fraction form
   20,697.31/28,562.91 = 14,658.37/x
3. Step 3: Cross multiply
   20,697.31x = 28,562.91 × 14,658.37
4. Step 4: Simplify right side
   20,697.31x = 418,685,703.06
5. Step 5: Solve for x
   x = 418,685,703.06/20,697.31
6. Step 6: Final answer
   x = 20,228.99