Finding the Fourth Proportional to 5,874.12, 8,105.10 and 3,987.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,874.12 : 8,105.10 = 3,987.20 : x
2. Step 2: Convert to fraction form
   5,874.12/8,105.10 = 3,987.20/x
3. Step 3: Cross multiply
   5,874.12x = 8,105.10 × 3,987.20
4. Step 4: Simplify right side
   5,874.12x = 32,316,654.72
5. Step 5: Solve for x
   x = 32,316,654.72/5,874.12
6. Step 6: Final answer
   x = 5,501.53