Finding the Fourth Proportional to 5,151.57, 7,725.75 and 2,685.07

Step by Step Solution

1. Step 1: Write the proportion equation
   5,151.57 : 7,725.75 = 2,685.07 : x
2. Step 2: Convert to fraction form
   5,151.57/7,725.75 = 2,685.07/x
3. Step 3: Cross multiply
   5,151.57x = 7,725.75 × 2,685.07
4. Step 4: Simplify right side
   5,151.57x = 20,744,179.55
5. Step 5: Solve for x
   x = 20,744,179.55/5,151.57
6. Step 6: Final answer
   x = 4,026.77