Finding the Fourth Proportional to 8,767.50, 12,100.17 and 4,991.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,767.50 : 12,100.17 = 4,991.22 : x
2. Step 2: Convert to fraction form
   8,767.50/12,100.17 = 4,991.22/x
3. Step 3: Cross multiply
   8,767.50x = 12,100.17 × 4,991.22
4. Step 4: Simplify right side
   8,767.50x = 60,394,610.51
5. Step 5: Solve for x
   x = 60,394,610.51/8,767.50
6. Step 6: Final answer
   x = 6,888.46