Finding the Fourth Proportional to 1,786.17, 2,465.16 and 1,078.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,786.17 : 2,465.16 = 1,078.05 : x
2. Step 2: Convert to fraction form
   1,786.17/2,465.16 = 1,078.05/x
3. Step 3: Cross multiply
   1,786.17x = 2,465.16 × 1,078.05
4. Step 4: Simplify right side
   1,786.17x = 2,657,565.74
5. Step 5: Solve for x
   x = 2,657,565.74/1,786.17
6. Step 6: Final answer
   x = 1,487.86