Finding the Fourth Proportional to 9,196.98, 12,688.54 and 6,172.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,196.98 : 12,688.54 = 6,172.84 : x
2. Step 2: Convert to fraction form
   9,196.98/12,688.54 = 6,172.84/x
3. Step 3: Cross multiply
   9,196.98x = 12,688.54 × 6,172.84
4. Step 4: Simplify right side
   9,196.98x = 78,324,327.25
5. Step 5: Solve for x
   x = 78,324,327.25/9,196.98
6. Step 6: Final answer
   x = 8,516.31