Finding the Fourth Proportional to 5,116.72, 7,640.46 and 4,487.36

Step by Step Solution

1. Step 1: Write the proportion equation
   5,116.72 : 7,640.46 = 4,487.36 : x
2. Step 2: Convert to fraction form
   5,116.72/7,640.46 = 4,487.36/x
3. Step 3: Cross multiply
   5,116.72x = 7,640.46 × 4,487.36
4. Step 4: Simplify right side
   5,116.72x = 34,285,494.59
5. Step 5: Solve for x
   x = 34,285,494.59/5,116.72
6. Step 6: Final answer
   x = 6,700.68