Finding the Fourth Proportional to 8,100.80, 12,152.16 and 2,905.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,100.80 : 12,152.16 = 2,905.28 : x
2. Step 2: Convert to fraction form
   8,100.80/12,152.16 = 2,905.28/x
3. Step 3: Cross multiply
   8,100.80x = 12,152.16 × 2,905.28
4. Step 4: Simplify right side
   8,100.80x = 35,305,427.40
5. Step 5: Solve for x
   x = 35,305,427.40/8,100.80
6. Step 6: Final answer
   x = 4,358.26