Finding the Fourth Proportional to 2,619.18, 3,929.01 and 1,319.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.18 : 3,929.01 = 1,319.82 : x
2. Step 2: Convert to fraction form
   2,619.18/3,929.01 = 1,319.82/x
3. Step 3: Cross multiply
   2,619.18x = 3,929.01 × 1,319.82
4. Step 4: Simplify right side
   2,619.18x = 5,185,585.98
5. Step 5: Solve for x
   x = 5,185,585.98/2,619.18
6. Step 6: Final answer
   x = 1,979.85