Finding the Fourth Proportional to 6,739.42, 9,308.86 and 5,680.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,739.42 : 9,308.86 = 5,680.72 : x
2. Step 2: Convert to fraction form
   6,739.42/9,308.86 = 5,680.72/x
3. Step 3: Cross multiply
   6,739.42x = 9,308.86 × 5,680.72
4. Step 4: Simplify right side
   6,739.42x = 52,881,027.18
5. Step 5: Solve for x
   x = 52,881,027.18/6,739.42
6. Step 6: Final answer
   x = 7,846.52