Finding the Fourth Proportional to 72,243.72, 99,692.46 and 39,976.92

Step by Step Solution

1. Step 1: Write the proportion equation
   72,243.72 : 99,692.46 = 39,976.92 : x
2. Step 2: Convert to fraction form
   72,243.72/99,692.46 = 39,976.92/x
3. Step 3: Cross multiply
   72,243.72x = 99,692.46 × 39,976.92
4. Step 4: Simplify right side
   72,243.72x = 3,985,397,498.02
5. Step 5: Solve for x
   x = 3,985,397,498.02/72,243.72
6. Step 6: Final answer
   x = 55,166.01