Finding the Fourth Proportional to 20,651.63, 30,978.05 and 5,069.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,651.63 : 30,978.05 = 5,069.25 : x
2. Step 2: Convert to fraction form
   20,651.63/30,978.05 = 5,069.25/x
3. Step 3: Cross multiply
   20,651.63x = 30,978.05 × 5,069.25
4. Step 4: Simplify right side
   20,651.63x = 157,035,454.62
5. Step 5: Solve for x
   x = 157,035,454.62/20,651.63
6. Step 6: Final answer
   x = 7,604.02