Finding the Fourth Proportional to 28,338.87, 42,509.83 and 8,615.94

Step by Step Solution

1. Step 1: Write the proportion equation
   28,338.87 : 42,509.83 = 8,615.94 : x
2. Step 2: Convert to fraction form
   28,338.87/42,509.83 = 8,615.94/x
3. Step 3: Cross multiply
   28,338.87x = 42,509.83 × 8,615.94
4. Step 4: Simplify right side
   28,338.87x = 366,262,144.69
5. Step 5: Solve for x
   x = 366,262,144.69/28,338.87
6. Step 6: Final answer
   x = 12,924.37