Finding the Fourth Proportional to 2,959.97, 4,085.47 and 1,780.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,959.97 : 4,085.47 = 1,780.81 : x
2. Step 2: Convert to fraction form
   2,959.97/4,085.47 = 1,780.81/x
3. Step 3: Cross multiply
   2,959.97x = 4,085.47 × 1,780.81
4. Step 4: Simplify right side
   2,959.97x = 7,275,445.83
5. Step 5: Solve for x
   x = 7,275,445.83/2,959.97
6. Step 6: Final answer
   x = 2,457.95