Finding the Fourth Proportional to 21,744.75, 30,006.86 and 12,670.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,744.75 : 30,006.86 = 12,670.98 : x
2. Step 2: Convert to fraction form
   21,744.75/30,006.86 = 12,670.98/x
3. Step 3: Cross multiply
   21,744.75x = 30,006.86 × 12,670.98
4. Step 4: Simplify right side
   21,744.75x = 380,216,172.89
5. Step 5: Solve for x
   x = 380,216,172.89/21,744.75
6. Step 6: Final answer
   x = 17,485.42