Finding the Fourth Proportional to 5,309.57, 7,958.59 and 2,670.76

Step by Step Solution

1. Step 1: Write the proportion equation
   5,309.57 : 7,958.59 = 2,670.76 : x
2. Step 2: Convert to fraction form
   5,309.57/7,958.59 = 2,670.76/x
3. Step 3: Cross multiply
   5,309.57x = 7,958.59 × 2,670.76
4. Step 4: Simplify right side
   5,309.57x = 21,255,487.10
5. Step 5: Solve for x
   x = 21,255,487.10/5,309.57
6. Step 6: Final answer
   x = 4,003.24