Finding the Fourth Proportional to 53,907, 80,857.72 and 20,624.50

Step by Step Solution

1. Step 1: Write the proportion equation
   53,907 : 80,857.72 = 20,624.50 : x
2. Step 2: Convert to fraction form
   53,907/80,857.72 = 20,624.50/x
3. Step 3: Cross multiply
   53,907x = 80,857.72 × 20,624.50
4. Step 4: Simplify right side
   53,907x = 1,667,650,046.14
5. Step 5: Solve for x
   x = 1,667,650,046.14/53,907
6. Step 6: Final answer
   x = 30,935.69