Finding the Fourth Proportional to 2,619.58, 3,614.89 and 1,440.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.58 : 3,614.89 = 1,440.76 : x
2. Step 2: Convert to fraction form
   2,619.58/3,614.89 = 1,440.76/x
3. Step 3: Cross multiply
   2,619.58x = 3,614.89 × 1,440.76
4. Step 4: Simplify right side
   2,619.58x = 5,208,181.71
5. Step 5: Solve for x
   x = 5,208,181.71/2,619.58
6. Step 6: Final answer
   x = 1,988.17