Finding the Fourth Proportional to 1,619.78, 2,424.06 and 1,323.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,619.78 : 2,424.06 = 1,323.86 : x
2. Step 2: Convert to fraction form
   1,619.78/2,424.06 = 1,323.86/x
3. Step 3: Cross multiply
   1,619.78x = 2,424.06 × 1,323.86
4. Step 4: Simplify right side
   1,619.78x = 3,209,103.95
5. Step 5: Solve for x
   x = 3,209,103.95/1,619.78
6. Step 6: Final answer
   x = 1,981.20