Finding the Fourth Proportional to 8,685.72, 13,031.28 and 5,908.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,685.72 : 13,031.28 = 5,908.32 : x
2. Step 2: Convert to fraction form
   8,685.72/13,031.28 = 5,908.32/x
3. Step 3: Cross multiply
   8,685.72x = 13,031.28 × 5,908.32
4. Step 4: Simplify right side
   8,685.72x = 76,992,972.25
5. Step 5: Solve for x
   x = 76,992,972.25/8,685.72
6. Step 6: Final answer
   x = 8,864.32