Finding the Fourth Proportional to 20,620.98, 30,931.56 and 7,468.20

Step by Step Solution

1. Step 1: Write the proportion equation
   20,620.98 : 30,931.56 = 7,468.20 : x
2. Step 2: Convert to fraction form
   20,620.98/30,931.56 = 7,468.20/x
3. Step 3: Cross multiply
   20,620.98x = 30,931.56 × 7,468.20
4. Step 4: Simplify right side
   20,620.98x = 231,003,076.39
5. Step 5: Solve for x
   x = 231,003,076.39/20,620.98
6. Step 6: Final answer
   x = 11,202.33