Finding the Fourth Proportional to 1,707.87, 2,356.23 and 1,078.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,707.87 : 2,356.23 = 1,078.47 : x
2. Step 2: Convert to fraction form
   1,707.87/2,356.23 = 1,078.47/x
3. Step 3: Cross multiply
   1,707.87x = 2,356.23 × 1,078.47
4. Step 4: Simplify right side
   1,707.87x = 2,541,123.37
5. Step 5: Solve for x
   x = 2,541,123.37/1,707.87
6. Step 6: Final answer
   x = 1,487.89