Finding the Fourth Proportional to 6,499.18, 9,749.79 and 2,115.62

Step by Step Solution

1. Step 1: Write the proportion equation
   6,499.18 : 9,749.79 = 2,115.62 : x
2. Step 2: Convert to fraction form
   6,499.18/9,749.79 = 2,115.62/x
3. Step 3: Cross multiply
   6,499.18x = 9,749.79 × 2,115.62
4. Step 4: Simplify right side
   6,499.18x = 20,626,850.72
5. Step 5: Solve for x
   x = 20,626,850.72/6,499.18
6. Step 6: Final answer
   x = 3,173.76