Finding the Fourth Proportional to 9,686.91, 14,528.45 and 2,665.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,686.91 : 14,528.45 = 2,665.12 : x
2. Step 2: Convert to fraction form
   9,686.91/14,528.45 = 2,665.12/x
3. Step 3: Cross multiply
   9,686.91x = 14,528.45 × 2,665.12
4. Step 4: Simplify right side
   9,686.91x = 38,720,033.01
5. Step 5: Solve for x
   x = 38,720,033.01/9,686.91
6. Step 6: Final answer
   x = 3,997.15