Finding the Fourth Proportional to 20,307.89, 30,450.15 and 7,826.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,307.89 : 30,450.15 = 7,826.31 : x
2. Step 2: Convert to fraction form
   20,307.89/30,450.15 = 7,826.31/x
3. Step 3: Cross multiply
   20,307.89x = 30,450.15 × 7,826.31
4. Step 4: Simplify right side
   20,307.89x = 238,312,313.45
5. Step 5: Solve for x
   x = 238,312,313.45/20,307.89
6. Step 6: Final answer
   x = 11,734.96