Finding the Fourth Proportional to 21,789.72, 32,664.87 and 7,935.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,789.72 : 32,664.87 = 7,935.48 : x
2. Step 2: Convert to fraction form
   21,789.72/32,664.87 = 7,935.48/x
3. Step 3: Cross multiply
   21,789.72x = 32,664.87 × 7,935.48
4. Step 4: Simplify right side
   21,789.72x = 259,211,422.59
5. Step 5: Solve for x
   x = 259,211,422.59/21,789.72
6. Step 6: Final answer
   x = 11,896.04