Finding the Fourth Proportional to 21,559.52, 29,749.73 and 12,127.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,559.52 : 29,749.73 = 12,127.88 : x
2. Step 2: Convert to fraction form
   21,559.52/29,749.73 = 12,127.88/x
3. Step 3: Cross multiply
   21,559.52x = 29,749.73 × 12,127.88
4. Step 4: Simplify right side
   21,559.52x = 360,801,155.47
5. Step 5: Solve for x
   x = 360,801,155.47/21,559.52
6. Step 6: Final answer
   x = 16,735.12