Finding the Fourth Proportional to 9,191.82, 12,687.32 and 5,417.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,191.82 : 12,687.32 = 5,417.18 : x
2. Step 2: Convert to fraction form
   9,191.82/12,687.32 = 5,417.18/x
3. Step 3: Cross multiply
   9,191.82x = 12,687.32 × 5,417.18
4. Step 4: Simplify right side
   9,191.82x = 68,729,496.16
5. Step 5: Solve for x
   x = 68,729,496.16/9,191.82
6. Step 6: Final answer
   x = 7,477.25