Finding the Fourth Proportional to 3,985, 5,978.46 and 1,249

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985 : 5,978.46 = 1,249 : x
2. Step 2: Convert to fraction form
   3,985/5,978.46 = 1,249/x
3. Step 3: Cross multiply
   3,985x = 5,978.46 × 1,249
4. Step 4: Simplify right side
   3,985x = 7,467,096.54
5. Step 5: Solve for x
   x = 7,467,096.54/3,985
6. Step 6: Final answer
   x = 1,873.80