Finding the Fourth Proportional to 28,010.72, 42,003.24 and 8,282.24

Step by Step Solution

1. Step 1: Write the proportion equation
   28,010.72 : 42,003.24 = 8,282.24 : x
2. Step 2: Convert to fraction form
   28,010.72/42,003.24 = 8,282.24/x
3. Step 3: Cross multiply
   28,010.72x = 42,003.24 × 8,282.24
4. Step 4: Simplify right side
   28,010.72x = 347,880,914.46
5. Step 5: Solve for x
   x = 347,880,914.46/28,010.72
6. Step 6: Final answer
   x = 12,419.56