Finding the Fourth Proportional to 21,762.72, 32,578.56 and 13,977.36

Step by Step Solution

1. Step 1: Write the proportion equation
   21,762.72 : 32,578.56 = 13,977.36 : x
2. Step 2: Convert to fraction form
   21,762.72/32,578.56 = 13,977.36/x
3. Step 3: Cross multiply
   21,762.72x = 32,578.56 × 13,977.36
4. Step 4: Simplify right side
   21,762.72x = 455,362,261.40
5. Step 5: Solve for x
   x = 455,362,261.40/21,762.72
6. Step 6: Final answer
   x = 20,923.96