Finding the Fourth Proportional to 8,817.50, 12,168.16 and 5,091.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,817.50 : 12,168.16 = 5,091.50 : x
2. Step 2: Convert to fraction form
   8,817.50/12,168.16 = 5,091.50/x
3. Step 3: Cross multiply
   8,817.50x = 12,168.16 × 5,091.50
4. Step 4: Simplify right side
   8,817.50x = 61,954,186.64
5. Step 5: Solve for x
   x = 61,954,186.64/8,817.50
6. Step 6: Final answer
   x = 7,026.28