Finding the Fourth Proportional to 1,686.18, 2,327.22 and 1,243.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.18 : 2,327.22 = 1,243.53 : x
2. Step 2: Convert to fraction form
   1,686.18/2,327.22 = 1,243.53/x
3. Step 3: Cross multiply
   1,686.18x = 2,327.22 × 1,243.53
4. Step 4: Simplify right side
   1,686.18x = 2,893,967.89
5. Step 5: Solve for x
   x = 2,893,967.89/1,686.18
6. Step 6: Final answer
   x = 1,716.29