Finding the Fourth Proportional to 8,356.72, 12,534.72 and 3,424.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,356.72 : 12,534.72 = 3,424.72 : x
2. Step 2: Convert to fraction form
   8,356.72/12,534.72 = 3,424.72/x
3. Step 3: Cross multiply
   8,356.72x = 12,534.72 × 3,424.72
4. Step 4: Simplify right side
   8,356.72x = 42,927,906.28
5. Step 5: Solve for x
   x = 42,927,906.28/8,356.72
6. Step 6: Final answer
   x = 5,136.93