Finding the Fourth Proportional to 8,817.90, 12,166.23 and 5,675.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,817.90 : 12,166.23 = 5,675.91 : x
2. Step 2: Convert to fraction form
   8,817.90/12,166.23 = 5,675.91/x
3. Step 3: Cross multiply
   8,817.90x = 12,166.23 × 5,675.91
4. Step 4: Simplify right side
   8,817.90x = 69,054,426.52
5. Step 5: Solve for x
   x = 69,054,426.52/8,817.90
6. Step 6: Final answer
   x = 7,831.16