Finding the Fourth Proportional to 2,619.61, 3,614.92 and 1,440.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.61 : 3,614.92 = 1,440.45 : x
2. Step 2: Convert to fraction form
   2,619.61/3,614.92 = 1,440.45/x
3. Step 3: Cross multiply
   2,619.61x = 3,614.92 × 1,440.45
4. Step 4: Simplify right side
   2,619.61x = 5,207,111.51
5. Step 5: Solve for x
   x = 5,207,111.51/2,619.61
6. Step 6: Final answer
   x = 1,987.75