Finding the Fourth Proportional to 72,456.05, 99,983.85 and 40,618.91

Step by Step Solution

1. Step 1: Write the proportion equation
   72,456.05 : 99,983.85 = 40,618.91 : x
2. Step 2: Convert to fraction form
   72,456.05/99,983.85 = 40,618.91/x
3. Step 3: Cross multiply
   72,456.05x = 99,983.85 × 40,618.91
4. Step 4: Simplify right side
   72,456.05x = 4,061,235,004.60
5. Step 5: Solve for x
   x = 4,061,235,004.60/72,456.05
6. Step 6: Final answer
   x = 56,051.01