Finding the Fourth Proportional to 1,776.16, 2,451.54 and 1,078.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.16 : 2,451.54 = 1,078.12 : x
2. Step 2: Convert to fraction form
   1,776.16/2,451.54 = 1,078.12/x
3. Step 3: Cross multiply
   1,776.16x = 2,451.54 × 1,078.12
4. Step 4: Simplify right side
   1,776.16x = 2,643,054.30
5. Step 5: Solve for x
   x = 2,643,054.30/1,776.16
6. Step 6: Final answer
   x = 1,488.07