Finding the Fourth Proportional to 6,309.40, 9,459.48 and 3,187.96

Step by Step Solution

1. Step 1: Write the proportion equation
   6,309.40 : 9,459.48 = 3,187.96 : x
2. Step 2: Convert to fraction form
   6,309.40/9,459.48 = 3,187.96/x
3. Step 3: Cross multiply
   6,309.40x = 9,459.48 × 3,187.96
4. Step 4: Simplify right side
   6,309.40x = 30,156,443.86
5. Step 5: Solve for x
   x = 30,156,443.86/6,309.40
6. Step 6: Final answer
   x = 4,779.61