Finding the Fourth Proportional to 20,209.37, 30,301.91 and 7,730.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,209.37 : 30,301.91 = 7,730.31 : x
2. Step 2: Convert to fraction form
   20,209.37/30,301.91 = 7,730.31/x
3. Step 3: Cross multiply
   20,209.37x = 30,301.91 × 7,730.31
4. Step 4: Simplify right side
   20,209.37x = 234,243,157.89
5. Step 5: Solve for x
   x = 234,243,157.89/20,209.37
6. Step 6: Final answer
   x = 11,590.82