Finding the Fourth Proportional to 2,018.48, 2,784.12 and 1,686.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.48 : 2,784.12 = 1,686.92 : x
2. Step 2: Convert to fraction form
   2,018.48/2,784.12 = 1,686.92/x
3. Step 3: Cross multiply
   2,018.48x = 2,784.12 × 1,686.92
4. Step 4: Simplify right side
   2,018.48x = 4,696,587.71
5. Step 5: Solve for x
   x = 4,696,587.71/2,018.48
6. Step 6: Final answer
   x = 2,326.79