Finding the Fourth Proportional to 21,803.50, 30,088.83 and 11,867.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,803.50 : 30,088.83 = 11,867.50 : x
2. Step 2: Convert to fraction form
   21,803.50/30,088.83 = 11,867.50/x
3. Step 3: Cross multiply
   21,803.50x = 30,088.83 × 11,867.50
4. Step 4: Simplify right side
   21,803.50x = 357,079,190.03
5. Step 5: Solve for x
   x = 357,079,190.03/21,803.50
6. Step 6: Final answer
   x = 16,377.15