Finding the Fourth Proportional to 8,817.16, 12,165.78 and 5,089

Step by Step Solution

1. Step 1: Write the proportion equation
   8,817.16 : 12,165.78 = 5,089 : x
2. Step 2: Convert to fraction form
   8,817.16/12,165.78 = 5,089/x
3. Step 3: Cross multiply
   8,817.16x = 12,165.78 × 5,089
4. Step 4: Simplify right side
   8,817.16x = 61,911,654.42
5. Step 5: Solve for x
   x = 61,911,654.42/8,817.16
6. Step 6: Final answer
   x = 7,021.72