Finding the Fourth Proportional to 105,057.25, 144,973.12 and 59,728.84

Step by Step Solution

1. Step 1: Write the proportion equation
   105,057.25 : 144,973.12 = 59,728.84 : x
2. Step 2: Convert to fraction form
   105,057.25/144,973.12 = 59,728.84/x
3. Step 3: Cross multiply
   105,057.25x = 144,973.12 × 59,728.84
4. Step 4: Simplify right side
   105,057.25x = 8,659,076,288.78
5. Step 5: Solve for x
   x = 8,659,076,288.78/105,057.25
6. Step 6: Final answer
   x = 82,422.45