Finding the Fourth Proportional to 13,196.84, 18,211.63 and 7,228.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.84 : 18,211.63 = 7,228.52 : x
2. Step 2: Convert to fraction form
   13,196.84/18,211.63 = 7,228.52/x
3. Step 3: Cross multiply
   13,196.84x = 18,211.63 × 7,228.52
4. Step 4: Simplify right side
   13,196.84x = 131,643,095.55
5. Step 5: Solve for x
   x = 131,643,095.55/13,196.84
6. Step 6: Final answer
   x = 9,975.35