Finding the Fourth Proportional to 21,871.01, 30,184.41 and 12,311.19

Step by Step Solution

1. Step 1: Write the proportion equation
   21,871.01 : 30,184.41 = 12,311.19 : x
2. Step 2: Convert to fraction form
   21,871.01/30,184.41 = 12,311.19/x
3. Step 3: Cross multiply
   21,871.01x = 30,184.41 × 12,311.19
4. Step 4: Simplify right side
   21,871.01x = 371,606,006.55
5. Step 5: Solve for x
   x = 371,606,006.55/21,871.01
6. Step 6: Final answer
   x = 16,990.80