Finding the Fourth Proportional to 1,686.92, 2,327.70 and 988.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.92 : 2,327.70 = 988.52 : x
2. Step 2: Convert to fraction form
   1,686.92/2,327.70 = 988.52/x
3. Step 3: Cross multiply
   1,686.92x = 2,327.70 × 988.52
4. Step 4: Simplify right side
   1,686.92x = 2,300,978.00
5. Step 5: Solve for x
   x = 2,300,978.00/1,686.92
6. Step 6: Final answer
   x = 1,364.01