Finding the Fourth Proportional to 3,987.96, 5,982.89 and 2,528.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987.96 : 5,982.89 = 2,528.34 : x
2. Step 2: Convert to fraction form
   3,987.96/5,982.89 = 2,528.34/x
3. Step 3: Cross multiply
   3,987.96x = 5,982.89 × 2,528.34
4. Step 4: Simplify right side
   3,987.96x = 15,126,767.46
5. Step 5: Solve for x
   x = 15,126,767.46/3,987.96
6. Step 6: Final answer
   x = 3,793.11