Finding the Fourth Proportional to 47,485.18, 71,231.82 and 12,424.78

Step by Step Solution

1. Step 1: Write the proportion equation
   47,485.18 : 71,231.82 = 12,424.78 : x
2. Step 2: Convert to fraction form
   47,485.18/71,231.82 = 12,424.78/x
3. Step 3: Cross multiply
   47,485.18x = 71,231.82 × 12,424.78
4. Step 4: Simplify right side
   47,485.18x = 885,039,692.50
5. Step 5: Solve for x
   x = 885,039,692.50/47,485.18
6. Step 6: Final answer
   x = 18,638.23