Finding the Fourth Proportional to 8,820.30, 12,172.42 and 5,283.44

Step by Step Solution

1. Step 1: Write the proportion equation
   8,820.30 : 12,172.42 = 5,283.44 : x
2. Step 2: Convert to fraction form
   8,820.30/12,172.42 = 5,283.44/x
3. Step 3: Cross multiply
   8,820.30x = 12,172.42 × 5,283.44
4. Step 4: Simplify right side
   8,820.30x = 64,312,250.72
5. Step 5: Solve for x
   x = 64,312,250.72/8,820.30
6. Step 6: Final answer
   x = 7,291.39