Finding the Fourth Proportional to 2,186.82, 3,018.29 and 1,440.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.82 : 3,018.29 = 1,440.86 : x
2. Step 2: Convert to fraction form
   2,186.82/3,018.29 = 1,440.86/x
3. Step 3: Cross multiply
   2,186.82x = 3,018.29 × 1,440.86
4. Step 4: Simplify right side
   2,186.82x = 4,348,911.03
5. Step 5: Solve for x
   x = 4,348,911.03/2,186.82
6. Step 6: Final answer
   x = 1,988.69