Finding the Fourth Proportional to 1,686.52, 2,327.46 and 988.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.52 : 2,327.46 = 988.28 : x
2. Step 2: Convert to fraction form
   1,686.52/2,327.46 = 988.28/x
3. Step 3: Cross multiply
   1,686.52x = 2,327.46 × 988.28
4. Step 4: Simplify right side
   1,686.52x = 2,300,182.17
5. Step 5: Solve for x
   x = 2,300,182.17/1,686.52
6. Step 6: Final answer
   x = 1,363.86