Finding the Fourth Proportional to 2,930.57, 4,392.78 and 1,080.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,930.57 : 4,392.78 = 1,080.51 : x
2. Step 2: Convert to fraction form
   2,930.57/4,392.78 = 1,080.51/x
3. Step 3: Cross multiply
   2,930.57x = 4,392.78 × 1,080.51
4. Step 4: Simplify right side
   2,930.57x = 4,746,428.27
5. Step 5: Solve for x
   x = 4,746,428.27/2,930.57
6. Step 6: Final answer
   x = 1,619.63