Finding the Fourth Proportional to 2,185.64, 3,019.07 and 1,619.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.64 : 3,019.07 = 1,619.61 : x
2. Step 2: Convert to fraction form
   2,185.64/3,019.07 = 1,619.61/x
3. Step 3: Cross multiply
   2,185.64x = 3,019.07 × 1,619.61
4. Step 4: Simplify right side
   2,185.64x = 4,889,707.86
5. Step 5: Solve for x
   x = 4,889,707.86/2,185.64
6. Step 6: Final answer
   x = 2,237.20