Finding the Fourth Proportional to 28,238.91, 42,362.94 and 9,520.62

Step by Step Solution

1. Step 1: Write the proportion equation
   28,238.91 : 42,362.94 = 9,520.62 : x
2. Step 2: Convert to fraction form
   28,238.91/42,362.94 = 9,520.62/x
3. Step 3: Cross multiply
   28,238.91x = 42,362.94 × 9,520.62
4. Step 4: Simplify right side
   28,238.91x = 403,321,453.82
5. Step 5: Solve for x
   x = 403,321,453.82/28,238.91
6. Step 6: Final answer
   x = 14,282.47