Finding the Fourth Proportional to 1,687.85, 2,327.72 and 1,058.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687.85 : 2,327.72 = 1,058.46 : x
2. Step 2: Convert to fraction form
   1,687.85/2,327.72 = 1,058.46/x
3. Step 3: Cross multiply
   1,687.85x = 2,327.72 × 1,058.46
4. Step 4: Simplify right side
   1,687.85x = 2,463,798.51
5. Step 5: Solve for x
   x = 2,463,798.51/1,687.85
6. Step 6: Final answer
   x = 1,459.73