Finding the Fourth Proportional to 3,490.69, 5,236.77 and 1,025.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,490.69 : 5,236.77 = 1,025.31 : x
2. Step 2: Convert to fraction form
   3,490.69/5,236.77 = 1,025.31/x
3. Step 3: Cross multiply
   3,490.69x = 5,236.77 × 1,025.31
4. Step 4: Simplify right side
   3,490.69x = 5,369,289.03
5. Step 5: Solve for x
   x = 5,369,289.03/3,490.69
6. Step 6: Final answer
   x = 1,538.17