Finding the Fourth Proportional to 21,807.99, 30,096 and 12,377.43

Step by Step Solution

1. Step 1: Write the proportion equation
   21,807.99 : 30,096 = 12,377.43 : x
2. Step 2: Convert to fraction form
   21,807.99/30,096 = 12,377.43/x
3. Step 3: Cross multiply
   21,807.99x = 30,096 × 12,377.43
4. Step 4: Simplify right side
   21,807.99x = 372,511,133.28
5. Step 5: Solve for x
   x = 372,511,133.28/21,807.99
6. Step 6: Final answer
   x = 17,081.41