Finding the Fourth Proportional to 72,234.36, 99,643.30 and 42,016.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,234.36 : 99,643.30 = 42,016.28 : x
2. Step 2: Convert to fraction form
   72,234.36/99,643.30 = 42,016.28/x
3. Step 3: Cross multiply
   72,234.36x = 99,643.30 × 42,016.28
4. Step 4: Simplify right side
   72,234.36x = 4,186,640,792.92
5. Step 5: Solve for x
   x = 4,186,640,792.92/72,234.36
6. Step 6: Final answer
   x = 57,959.13