Finding the Fourth Proportional to 21,686.00, 32,509.01 and 7,638.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,686.00 : 32,509.01 = 7,638.37 : x
2. Step 2: Convert to fraction form
   21,686.00/32,509.01 = 7,638.37/x
3. Step 3: Cross multiply
   21,686.00x = 32,509.01 × 7,638.37
4. Step 4: Simplify right side
   21,686.00x = 248,315,784.54
5. Step 5: Solve for x
   x = 248,315,784.54/21,686.00
6. Step 6: Final answer
   x = 11,450.51