Finding the Fourth Proportional to 6,078.72, 8,386.80 and 3,720.24

Step by Step Solution

1. Step 1: Write the proportion equation
   6,078.72 : 8,386.80 = 3,720.24 : x
2. Step 2: Convert to fraction form
   6,078.72/8,386.80 = 3,720.24/x
3. Step 3: Cross multiply
   6,078.72x = 8,386.80 × 3,720.24
4. Step 4: Simplify right side
   6,078.72x = 31,200,908.83
5. Step 5: Solve for x
   x = 31,200,908.83/6,078.72
6. Step 6: Final answer
   x = 5,132.81