Finding the Fourth Proportional to 2,018.32, 2,781.86 and 1,539.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.32 : 2,781.86 = 1,539.61 : x
2. Step 2: Convert to fraction form
   2,018.32/2,781.86 = 1,539.61/x
3. Step 3: Cross multiply
   2,018.32x = 2,781.86 × 1,539.61
4. Step 4: Simplify right side
   2,018.32x = 4,282,982.58
5. Step 5: Solve for x
   x = 4,282,982.58/2,018.32
6. Step 6: Final answer
   x = 2,122.05