Finding the Fourth Proportional to 20,224.81, 30,350.89 and 7,077.30

Step by Step Solution

1. Step 1: Write the proportion equation
   20,224.81 : 30,350.89 = 7,077.30 : x
2. Step 2: Convert to fraction form
   20,224.81/30,350.89 = 7,077.30/x
3. Step 3: Cross multiply
   20,224.81x = 30,350.89 × 7,077.30
4. Step 4: Simplify right side
   20,224.81x = 214,802,285.83
5. Step 5: Solve for x
   x = 214,802,285.83/20,224.81
6. Step 6: Final answer
   x = 10,620.73