Finding the Fourth Proportional to 21,591.88, 29,796.83 and 12,641.14

Step by Step Solution

1. Step 1: Write the proportion equation
   21,591.88 : 29,796.83 = 12,641.14 : x
2. Step 2: Convert to fraction form
   21,591.88/29,796.83 = 12,641.14/x
3. Step 3: Cross multiply
   21,591.88x = 29,796.83 × 12,641.14
4. Step 4: Simplify right side
   21,591.88x = 376,665,899.59
5. Step 5: Solve for x
   x = 376,665,899.59/21,591.88
6. Step 6: Final answer
   x = 17,444.79