Finding the Fourth Proportional to 8,817.59, 12,168.50 and 4,988.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,817.59 : 12,168.50 = 4,988.91 : x
2. Step 2: Convert to fraction form
   8,817.59/12,168.50 = 4,988.91/x
3. Step 3: Cross multiply
   8,817.59x = 12,168.50 × 4,988.91
4. Step 4: Simplify right side
   8,817.59x = 60,707,526.39
5. Step 5: Solve for x
   x = 60,707,526.39/8,817.59
6. Step 6: Final answer
   x = 6,884.82