Finding the Fourth Proportional to 8,827.70, 12,185.69 and 5,290.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,827.70 : 12,185.69 = 5,290.22 : x
2. Step 2: Convert to fraction form
   8,827.70/12,185.69 = 5,290.22/x
3. Step 3: Cross multiply
   8,827.70x = 12,185.69 × 5,290.22
4. Step 4: Simplify right side
   8,827.70x = 64,465,011.42
5. Step 5: Solve for x
   x = 64,465,011.42/8,827.70
6. Step 6: Final answer
   x = 7,302.59