Finding the Fourth Proportional to 72,012.24, 99,381.69 and 40,181.82

Step by Step Solution

1. Step 1: Write the proportion equation
   72,012.24 : 99,381.69 = 40,181.82 : x
2. Step 2: Convert to fraction form
   72,012.24/99,381.69 = 40,181.82/x
3. Step 3: Cross multiply
   72,012.24x = 99,381.69 × 40,181.82
4. Step 4: Simplify right side
   72,012.24x = 3,993,337,178.88
5. Step 5: Solve for x
   x = 3,993,337,178.88/72,012.24
6. Step 6: Final answer
   x = 55,453.59