Finding the Fourth Proportional to 5,134.78, 7,085.82 and 2,896.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,134.78 : 7,085.82 = 2,896.72 : x
2. Step 2: Convert to fraction form
   5,134.78/7,085.82 = 2,896.72/x
3. Step 3: Cross multiply
   5,134.78x = 7,085.82 × 2,896.72
4. Step 4: Simplify right side
   5,134.78x = 20,525,636.51
5. Step 5: Solve for x
   x = 20,525,636.51/5,134.78
6. Step 6: Final answer
   x = 3,997.37