Finding the Fourth Proportional to 28,065.30, 42,097.59 and 8,075.28

Step by Step Solution

1. Step 1: Write the proportion equation
   28,065.30 : 42,097.59 = 8,075.28 : x
2. Step 2: Convert to fraction form
   28,065.30/42,097.59 = 8,075.28/x
3. Step 3: Cross multiply
   28,065.30x = 42,097.59 × 8,075.28
4. Step 4: Simplify right side
   28,065.30x = 339,949,826.58
5. Step 5: Solve for x
   x = 339,949,826.58/28,065.30
6. Step 6: Final answer
   x = 12,112.82