Finding the Fourth Proportional to 28,356.48, 42,521.49 and 8,630.96

Step by Step Solution

1. Step 1: Write the proportion equation
   28,356.48 : 42,521.49 = 8,630.96 : x
2. Step 2: Convert to fraction form
   28,356.48/42,521.49 = 8,630.96/x
3. Step 3: Cross multiply
   28,356.48x = 42,521.49 × 8,630.96
4. Step 4: Simplify right side
   28,356.48x = 367,001,066.72
5. Step 5: Solve for x
   x = 367,001,066.72/28,356.48
6. Step 6: Final answer
   x = 12,942.41