Finding the Fourth Proportional to 12,816.01, 17,686.92 and 7,508.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,816.01 : 17,686.92 = 7,508.89 : x
2. Step 2: Convert to fraction form
   12,816.01/17,686.92 = 7,508.89/x
3. Step 3: Cross multiply
   12,816.01x = 17,686.92 × 7,508.89
4. Step 4: Simplify right side
   12,816.01x = 132,809,136.72
5. Step 5: Solve for x
   x = 132,809,136.72/12,816.01
6. Step 6: Final answer
   x = 10,362.75