Finding the Fourth Proportional to 105,016.72, 144,931.68 and 59,708.92

Step by Step Solution

1. Step 1: Write the proportion equation
   105,016.72 : 144,931.68 = 59,708.92 : x
2. Step 2: Convert to fraction form
   105,016.72/144,931.68 = 59,708.92/x
3. Step 3: Cross multiply
   105,016.72x = 144,931.68 × 59,708.92
4. Step 4: Simplify right side
   105,016.72x = 8,653,713,063.38
5. Step 5: Solve for x
   x = 8,653,713,063.38/105,016.72
6. Step 6: Final answer
   x = 82,403.20