Finding the Fourth Proportional to 28,229.89, 42,350.33 and 8,507.47

Step by Step Solution

1. Step 1: Write the proportion equation
   28,229.89 : 42,350.33 = 8,507.47 : x
2. Step 2: Convert to fraction form
   28,229.89/42,350.33 = 8,507.47/x
3. Step 3: Cross multiply
   28,229.89x = 42,350.33 × 8,507.47
4. Step 4: Simplify right side
   28,229.89x = 360,294,119.43
5. Step 5: Solve for x
   x = 360,294,119.43/28,229.89
6. Step 6: Final answer
   x = 12,762.86