Finding the Fourth Proportional to 3,685.31, 5,085.67 and 2,029.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.31 : 5,085.67 = 2,029.31 : x
2. Step 2: Convert to fraction form
   3,685.31/5,085.67 = 2,029.31/x
3. Step 3: Cross multiply
   3,685.31x = 5,085.67 × 2,029.31
4. Step 4: Simplify right side
   3,685.31x = 10,320,400.99
5. Step 5: Solve for x
   x = 10,320,400.99/3,685.31
6. Step 6: Final answer
   x = 2,800.42