Finding the Fourth Proportional to 21,945.96, 32,914.62 and 8,091.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,945.96 : 32,914.62 = 8,091.72 : x
2. Step 2: Convert to fraction form
   21,945.96/32,914.62 = 8,091.72/x
3. Step 3: Cross multiply
   21,945.96x = 32,914.62 × 8,091.72
4. Step 4: Simplify right side
   21,945.96x = 266,335,888.95
5. Step 5: Solve for x
   x = 266,335,888.95/21,945.96
6. Step 6: Final answer
   x = 12,135.99