Finding the Fourth Proportional to 8,100.72, 12,157.56 and 4,206.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,100.72 : 12,157.56 = 4,206.24 : x
2. Step 2: Convert to fraction form
   8,100.72/12,157.56 = 4,206.24/x
3. Step 3: Cross multiply
   8,100.72x = 12,157.56 × 4,206.24
4. Step 4: Simplify right side
   8,100.72x = 51,137,615.17
5. Step 5: Solve for x
   x = 51,137,615.17/8,100.72
6. Step 6: Final answer
   x = 6,312.72