Finding the Fourth Proportional to 28,067.30, 42,100.58 and 8,077.28

Step by Step Solution

1. Step 1: Write the proportion equation
   28,067.30 : 42,100.58 = 8,077.28 : x
2. Step 2: Convert to fraction form
   28,067.30/42,100.58 = 8,077.28/x
3. Step 3: Cross multiply
   28,067.30x = 42,100.58 × 8,077.28
4. Step 4: Simplify right side
   28,067.30x = 340,058,172.82
5. Step 5: Solve for x
   x = 340,058,172.82/28,067.30
6. Step 6: Final answer
   x = 12,115.81