Finding the Fourth Proportional to 28,065.15, 42,105.69 and 8,344.08

Step by Step Solution

1. Step 1: Write the proportion equation
   28,065.15 : 42,105.69 = 8,344.08 : x
2. Step 2: Convert to fraction form
   28,065.15/42,105.69 = 8,344.08/x
3. Step 3: Cross multiply
   28,065.15x = 42,105.69 × 8,344.08
4. Step 4: Simplify right side
   28,065.15x = 351,333,245.82
5. Step 5: Solve for x
   x = 351,333,245.82/28,065.15
6. Step 6: Final answer
   x = 12,518.49