Finding the Fourth Proportional to 2,186.84, 3,019.10 and 1,440.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.84 : 3,019.10 = 1,440.53 : x
2. Step 2: Convert to fraction form
   2,186.84/3,019.10 = 1,440.53/x
3. Step 3: Cross multiply
   2,186.84x = 3,019.10 × 1,440.53
4. Step 4: Simplify right side
   2,186.84x = 4,349,081.82
5. Step 5: Solve for x
   x = 4,349,081.82/2,186.84
6. Step 6: Final answer
   x = 1,988.75