Finding the Fourth Proportional to 9,166.16, 12,648.06 and 5,387.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,166.16 : 12,648.06 = 5,387.09 : x
2. Step 2: Convert to fraction form
   9,166.16/12,648.06 = 5,387.09/x
3. Step 3: Cross multiply
   9,166.16x = 12,648.06 × 5,387.09
4. Step 4: Simplify right side
   9,166.16x = 68,136,174.31
5. Step 5: Solve for x
   x = 68,136,174.31/9,166.16
6. Step 6: Final answer
   x = 7,433.45