Finding the Fourth Proportional to 20,535.59, 30,807.18 and 6,499.15

Step by Step Solution

1. Step 1: Write the proportion equation
   20,535.59 : 30,807.18 = 6,499.15 : x
2. Step 2: Convert to fraction form
   20,535.59/30,807.18 = 6,499.15/x
3. Step 3: Cross multiply
   20,535.59x = 30,807.18 × 6,499.15
4. Step 4: Simplify right side
   20,535.59x = 200,220,406.88
5. Step 5: Solve for x
   x = 200,220,406.88/20,535.59
6. Step 6: Final answer
   x = 9,749.92