Finding the Fourth Proportional to 72,326.20, 99,807.24 and 42,112.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,326.20 : 99,807.24 = 42,112.42 : x
2. Step 2: Convert to fraction form
   72,326.20/99,807.24 = 42,112.42/x
3. Step 3: Cross multiply
   72,326.20x = 99,807.24 × 42,112.42
4. Step 4: Simplify right side
   72,326.20x = 4,203,124,409.92
5. Step 5: Solve for x
   x = 4,203,124,409.92/72,326.20
6. Step 6: Final answer
   x = 58,113.44