Finding the Fourth Proportional to 20,469.69, 30,703.10 and 7,987.37

Step by Step Solution

1. Step 1: Write the proportion equation
   20,469.69 : 30,703.10 = 7,987.37 : x
2. Step 2: Convert to fraction form
   20,469.69/30,703.10 = 7,987.37/x
3. Step 3: Cross multiply
   20,469.69x = 30,703.10 × 7,987.37
4. Step 4: Simplify right side
   20,469.69x = 245,236,826.39
5. Step 5: Solve for x
   x = 245,236,826.39/20,469.69
6. Step 6: Final answer
   x = 11,980.49