Finding the Fourth Proportional to 21,743.31, 32,549.28 and 19,664.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,743.31 : 32,549.28 = 19,664.28 : x
2. Step 2: Convert to fraction form
   21,743.31/32,549.28 = 19,664.28/x
3. Step 3: Cross multiply
   21,743.31x = 32,549.28 × 19,664.28
4. Step 4: Simplify right side
   21,743.31x = 640,058,155.72
5. Step 5: Solve for x
   x = 640,058,155.72/21,743.31
6. Step 6: Final answer
   x = 29,437.02