Finding the Fourth Proportional to 9,196.82, 12,690.88 and 5,218.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,196.82 : 12,690.88 = 5,218.60 : x
2. Step 2: Convert to fraction form
   9,196.82/12,690.88 = 5,218.60/x
3. Step 3: Cross multiply
   9,196.82x = 12,690.88 × 5,218.60
4. Step 4: Simplify right side
   9,196.82x = 66,228,536.82
5. Step 5: Solve for x
   x = 66,228,536.82/9,196.82
6. Step 6: Final answer
   x = 7,201.25