Finding the Fourth Proportional to 9,966.82, 14,922.12 and 5,276.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,966.82 : 14,922.12 = 5,276.20 : x
2. Step 2: Convert to fraction form
   9,966.82/14,922.12 = 5,276.20/x
3. Step 3: Cross multiply
   9,966.82x = 14,922.12 × 5,276.20
4. Step 4: Simplify right side
   9,966.82x = 78,732,089.54
5. Step 5: Solve for x
   x = 78,732,089.54/9,966.82
6. Step 6: Final answer
   x = 7,899.42