Finding the Fourth Proportional to 8,820.69, 12,172.71 and 4,842.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,820.69 : 12,172.71 = 4,842.18 : x
2. Step 2: Convert to fraction form
   8,820.69/12,172.71 = 4,842.18/x
3. Step 3: Cross multiply
   8,820.69x = 12,172.71 × 4,842.18
4. Step 4: Simplify right side
   8,820.69x = 58,942,452.91
5. Step 5: Solve for x
   x = 58,942,452.91/8,820.69
6. Step 6: Final answer
   x = 6,682.30