Finding the Fourth Proportional to 9,686.66, 14,526.72 and 3,111.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,686.66 : 14,526.72 = 3,111.30 : x
2. Step 2: Convert to fraction form
   9,686.66/14,526.72 = 3,111.30/x
3. Step 3: Cross multiply
   9,686.66x = 14,526.72 × 3,111.30
4. Step 4: Simplify right side
   9,686.66x = 45,196,983.94
5. Step 5: Solve for x
   x = 45,196,983.94/9,686.66
6. Step 6: Final answer
   x = 4,665.90