Finding the Fourth Proportional to 21,945.83, 32,910.96 and 7,902.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,945.83 : 32,910.96 = 7,902.09 : x
2. Step 2: Convert to fraction form
   21,945.83/32,910.96 = 7,902.09/x
3. Step 3: Cross multiply
   21,945.83x = 32,910.96 × 7,902.09
4. Step 4: Simplify right side
   21,945.83x = 260,065,367.91
5. Step 5: Solve for x
   x = 260,065,367.91/21,945.83
6. Step 6: Final answer
   x = 11,850.33