Finding the Fourth Proportional to 5,789.31, 7,989.25 and 3,136.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,789.31 : 7,989.25 = 3,136.72 : x
2. Step 2: Convert to fraction form
   5,789.31/7,989.25 = 3,136.72/x
3. Step 3: Cross multiply
   5,789.31x = 7,989.25 × 3,136.72
4. Step 4: Simplify right side
   5,789.31x = 25,060,053.36
5. Step 5: Solve for x
   x = 25,060,053.36/5,789.31
6. Step 6: Final answer
   x = 4,328.68