Finding the Fourth Proportional to 5,156.78, 7,740.05 and 2,693.39

Step by Step Solution

1. Step 1: Write the proportion equation
   5,156.78 : 7,740.05 = 2,693.39 : x
2. Step 2: Convert to fraction form
   5,156.78/7,740.05 = 2,693.39/x
3. Step 3: Cross multiply
   5,156.78x = 7,740.05 × 2,693.39
4. Step 4: Simplify right side
   5,156.78x = 20,846,921.10
5. Step 5: Solve for x
   x = 20,846,921.10/5,156.78
6. Step 6: Final answer
   x = 4,042.63