Finding the Fourth Proportional to 1,848.42, 2,773.17 and 678.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,848.42 : 2,773.17 = 678.78 : x
2. Step 2: Convert to fraction form
   1,848.42/2,773.17 = 678.78/x
3. Step 3: Cross multiply
   1,848.42x = 2,773.17 × 678.78
4. Step 4: Simplify right side
   1,848.42x = 1,882,372.33
5. Step 5: Solve for x
   x = 1,882,372.33/1,848.42
6. Step 6: Final answer
   x = 1,018.37