Finding the Fourth Proportional to 28,003.09, 42,012.83 and 8,282.15

Step by Step Solution

1. Step 1: Write the proportion equation
   28,003.09 : 42,012.83 = 8,282.15 : x
2. Step 2: Convert to fraction form
   28,003.09/42,012.83 = 8,282.15/x
3. Step 3: Cross multiply
   28,003.09x = 42,012.83 × 8,282.15
4. Step 4: Simplify right side
   28,003.09x = 347,956,559.98
5. Step 5: Solve for x
   x = 347,956,559.98/28,003.09
6. Step 6: Final answer
   x = 12,425.65