Finding the Fourth Proportional to 20,156.84, 27,789.72 and 16,558.28

Step by Step Solution

1. Step 1: Write the proportion equation
   20,156.84 : 27,789.72 = 16,558.28 : x
2. Step 2: Convert to fraction form
   20,156.84/27,789.72 = 16,558.28/x
3. Step 3: Cross multiply
   20,156.84x = 27,789.72 × 16,558.28
4. Step 4: Simplify right side
   20,156.84x = 460,149,964.88
5. Step 5: Solve for x
   x = 460,149,964.88/20,156.84
6. Step 6: Final answer
   x = 22,828.48