Finding the Fourth Proportional to 2,018.01, 2,781.43 and 1,539.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.01 : 2,781.43 = 1,539.30 : x
2. Step 2: Convert to fraction form
   2,018.01/2,781.43 = 1,539.30/x
3. Step 3: Cross multiply
   2,018.01x = 2,781.43 × 1,539.30
4. Step 4: Simplify right side
   2,018.01x = 4,281,451.35
5. Step 5: Solve for x
   x = 4,281,451.35/2,018.01
6. Step 6: Final answer
   x = 2,121.62