Finding the Fourth Proportional to 12,196.59, 18,294.45 and 5,172.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.59 : 18,294.45 = 5,172.08 : x
2. Step 2: Convert to fraction form
   12,196.59/18,294.45 = 5,172.08/x
3. Step 3: Cross multiply
   12,196.59x = 18,294.45 × 5,172.08
4. Step 4: Simplify right side
   12,196.59x = 94,620,358.96
5. Step 5: Solve for x
   x = 94,620,358.96/12,196.59
6. Step 6: Final answer
   x = 7,757.94