Finding the Fourth Proportional to 20,314.88, 30,474.78 and 7,164.56

Step by Step Solution

1. Step 1: Write the proportion equation
   20,314.88 : 30,474.78 = 7,164.56 : x
2. Step 2: Convert to fraction form
   20,314.88/30,474.78 = 7,164.56/x
3. Step 3: Cross multiply
   20,314.88x = 30,474.78 × 7,164.56
4. Step 4: Simplify right side
   20,314.88x = 218,338,389.80
5. Step 5: Solve for x
   x = 218,338,389.80/20,314.88
6. Step 6: Final answer
   x = 10,747.71