Finding the Fourth Proportional to 20,572.06, 30,851.70 and 7,422.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,572.06 : 30,851.70 = 7,422.72 : x
2. Step 2: Convert to fraction form
   20,572.06/30,851.70 = 7,422.72/x
3. Step 3: Cross multiply
   20,572.06x = 30,851.70 × 7,422.72
4. Step 4: Simplify right side
   20,572.06x = 229,003,530.62
5. Step 5: Solve for x
   x = 229,003,530.62/20,572.06
6. Step 6: Final answer
   x = 11,131.77