Finding the Fourth Proportional to 1,607.69, 2,410.36 and 1,086.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,607.69 : 2,410.36 = 1,086.38 : x
2. Step 2: Convert to fraction form
   1,607.69/2,410.36 = 1,086.38/x
3. Step 3: Cross multiply
   1,607.69x = 2,410.36 × 1,086.38
4. Step 4: Simplify right side
   1,607.69x = 2,618,574.28
5. Step 5: Solve for x
   x = 2,618,574.28/1,607.69
6. Step 6: Final answer
   x = 1,628.79