Finding the Fourth Proportional to 8,172.82, 12,256.46 and 2,907.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,172.82 : 12,256.46 = 2,907.60 : x
2. Step 2: Convert to fraction form
   8,172.82/12,256.46 = 2,907.60/x
3. Step 3: Cross multiply
   8,172.82x = 12,256.46 × 2,907.60
4. Step 4: Simplify right side
   8,172.82x = 35,636,883.10
5. Step 5: Solve for x
   x = 35,636,883.10/8,172.82
6. Step 6: Final answer
   x = 4,360.41