Finding the Fourth Proportional to 5,980.80, 8,248.86 and 5,309.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,980.80 : 8,248.86 = 5,309.31 : x
2. Step 2: Convert to fraction form
   5,980.80/8,248.86 = 5,309.31/x
3. Step 3: Cross multiply
   5,980.80x = 8,248.86 × 5,309.31
4. Step 4: Simplify right side
   5,980.80x = 43,795,754.89
5. Step 5: Solve for x
   x = 43,795,754.89/5,980.80
6. Step 6: Final answer
   x = 7,322.73