Finding the Fourth Proportional to 1,686.48, 2,327.31 and 1,095.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.48 : 2,327.31 = 1,095.90 : x
2. Step 2: Convert to fraction form
   1,686.48/2,327.31 = 1,095.90/x
3. Step 3: Cross multiply
   1,686.48x = 2,327.31 × 1,095.90
4. Step 4: Simplify right side
   1,686.48x = 2,550,499.03
5. Step 5: Solve for x
   x = 2,550,499.03/1,686.48
6. Step 6: Final answer
   x = 1,512.32