Finding the Fourth Proportional to 21,740.56, 30,002.71 and 12,180.85

Step by Step Solution

1. Step 1: Write the proportion equation
   21,740.56 : 30,002.71 = 12,180.85 : x
2. Step 2: Convert to fraction form
   21,740.56/30,002.71 = 12,180.85/x
3. Step 3: Cross multiply
   21,740.56x = 30,002.71 × 12,180.85
4. Step 4: Simplify right side
   21,740.56x = 365,458,510.10
5. Step 5: Solve for x
   x = 365,458,510.10/21,740.56
6. Step 6: Final answer
   x = 16,809.99