Finding the Fourth Proportional to 1,863.02, 2,570.34 and 1,076.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,863.02 : 2,570.34 = 1,076.78 : x
2. Step 2: Convert to fraction form
   1,863.02/2,570.34 = 1,076.78/x
3. Step 3: Cross multiply
   1,863.02x = 2,570.34 × 1,076.78
4. Step 4: Simplify right side
   1,863.02x = 2,767,690.71
5. Step 5: Solve for x
   x = 2,767,690.71/1,863.02
6. Step 6: Final answer
   x = 1,485.59