Finding the Fourth Proportional to 9,196.25, 12,689.95 and 5,162.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,196.25 : 12,689.95 = 5,162.15 : x
2. Step 2: Convert to fraction form
   9,196.25/12,689.95 = 5,162.15/x
3. Step 3: Cross multiply
   9,196.25x = 12,689.95 × 5,162.15
4. Step 4: Simplify right side
   9,196.25x = 65,507,460.07
5. Step 5: Solve for x
   x = 65,507,460.07/9,196.25
6. Step 6: Final answer
   x = 7,123.28