Finding the Fourth Proportional to 72,361.20, 99,855.54 and 42,147.48

Step by Step Solution

1. Step 1: Write the proportion equation
   72,361.20 : 99,855.54 = 42,147.48 : x
2. Step 2: Convert to fraction form
   72,361.20/99,855.54 = 42,147.48/x
3. Step 3: Cross multiply
   72,361.20x = 99,855.54 × 42,147.48
4. Step 4: Simplify right side
   72,361.20x = 4,208,659,375.04
5. Step 5: Solve for x
   x = 4,208,659,375.04/72,361.20
6. Step 6: Final answer
   x = 58,161.82