Finding the Fourth Proportional to 8,945.28, 13,412.72 and 5,987.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,945.28 : 13,412.72 = 5,987.10 : x
2. Step 2: Convert to fraction form
   8,945.28/13,412.72 = 5,987.10/x
3. Step 3: Cross multiply
   8,945.28x = 13,412.72 × 5,987.10
4. Step 4: Simplify right side
   8,945.28x = 80,303,295.91
5. Step 5: Solve for x
   x = 80,303,295.91/8,945.28
6. Step 6: Final answer
   x = 8,977.17