Finding the Fourth Proportional to 3,985.42, 5,974.71 and 1,388.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.42 : 5,974.71 = 1,388.02 : x
2. Step 2: Convert to fraction form
   3,985.42/5,974.71 = 1,388.02/x
3. Step 3: Cross multiply
   3,985.42x = 5,974.71 × 1,388.02
4. Step 4: Simplify right side
   3,985.42x = 8,293,016.97
5. Step 5: Solve for x
   x = 8,293,016.97/3,985.42
6. Step 6: Final answer
   x = 2,080.84