Finding the Fourth Proportional to 28,048.72, 42,065.88 and 8,322.64

Step by Step Solution

1. Step 1: Write the proportion equation
   28,048.72 : 42,065.88 = 8,322.64 : x
2. Step 2: Convert to fraction form
   28,048.72/42,065.88 = 8,322.64/x
3. Step 3: Cross multiply
   28,048.72x = 42,065.88 × 8,322.64
4. Step 4: Simplify right side
   28,048.72x = 350,099,175.52
5. Step 5: Solve for x
   x = 350,099,175.52/28,048.72
6. Step 6: Final answer
   x = 12,481.82