Finding the Fourth Proportional to 12,986.89, 17,922.01 and 7,608.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,986.89 : 17,922.01 = 7,608.13 : x
2. Step 2: Convert to fraction form
   12,986.89/17,922.01 = 7,608.13/x
3. Step 3: Cross multiply
   12,986.89x = 17,922.01 × 7,608.13
4. Step 4: Simplify right side
   12,986.89x = 136,352,981.94
5. Step 5: Solve for x
   x = 136,352,981.94/12,986.89
6. Step 6: Final answer
   x = 10,499.28