Finding the Fourth Proportional to 6,499.55, 9,750.15 and 2,115.51

Step by Step Solution

1. Step 1: Write the proportion equation
   6,499.55 : 9,750.15 = 2,115.51 : x
2. Step 2: Convert to fraction form
   6,499.55/9,750.15 = 2,115.51/x
3. Step 3: Cross multiply
   6,499.55x = 9,750.15 × 2,115.51
4. Step 4: Simplify right side
   6,499.55x = 20,626,539.83
5. Step 5: Solve for x
   x = 20,626,539.83/6,499.55
6. Step 6: Final answer
   x = 3,173.54