Finding the Fourth Proportional to 21,633.24, 32,443.38 and 7,779

Step by Step Solution

1. Step 1: Write the proportion equation
   21,633.24 : 32,443.38 = 7,779 : x
2. Step 2: Convert to fraction form
   21,633.24/32,443.38 = 7,779/x
3. Step 3: Cross multiply
   21,633.24x = 32,443.38 × 7,779
4. Step 4: Simplify right side
   21,633.24x = 252,377,053.02
5. Step 5: Solve for x
   x = 252,377,053.02/21,633.24
6. Step 6: Final answer
   x = 11,666.17