Finding the Fourth Proportional to 28,362.72, 42,541.56 and 8,645.88

Step by Step Solution

1. Step 1: Write the proportion equation
   28,362.72 : 42,541.56 = 8,645.88 : x
2. Step 2: Convert to fraction form
   28,362.72/42,541.56 = 8,645.88/x
3. Step 3: Cross multiply
   28,362.72x = 42,541.56 × 8,645.88
4. Step 4: Simplify right side
   28,362.72x = 367,809,222.77
5. Step 5: Solve for x
   x = 367,809,222.77/28,362.72
6. Step 6: Final answer
   x = 12,968.05