Finding the Fourth Proportional to 6,309.98, 8,697.30 and 5,780.54

Step by Step Solution

1. Step 1: Write the proportion equation
   6,309.98 : 8,697.30 = 5,780.54 : x
2. Step 2: Convert to fraction form
   6,309.98/8,697.30 = 5,780.54/x
3. Step 3: Cross multiply
   6,309.98x = 8,697.30 × 5,780.54
4. Step 4: Simplify right side
   6,309.98x = 50,275,090.54
5. Step 5: Solve for x
   x = 50,275,090.54/6,309.98
6. Step 6: Final answer
   x = 7,967.55