Finding the Fourth Proportional to 72,361.20, 99,870.82 and 42,164.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,361.20 : 99,870.82 = 42,164.42 : x
2. Step 2: Convert to fraction form
   72,361.20/99,870.82 = 42,164.42/x
3. Step 3: Cross multiply
   72,361.20x = 99,870.82 × 42,164.42
4. Step 4: Simplify right side
   72,361.20x = 4,210,995,200.22
5. Step 5: Solve for x
   x = 4,210,995,200.22/72,361.20
6. Step 6: Final answer
   x = 58,194.10