Finding the Fourth Proportional to 105,057.50, 144,973.44 and 59,729.09

Step by Step Solution

1. Step 1: Write the proportion equation
   105,057.50 : 144,973.44 = 59,729.09 : x
2. Step 2: Convert to fraction form
   105,057.50/144,973.44 = 59,729.09/x
3. Step 3: Cross multiply
   105,057.50x = 144,973.44 × 59,729.09
4. Step 4: Simplify right side
   105,057.50x = 8,659,130,920.50
5. Step 5: Solve for x
   x = 8,659,130,920.50/105,057.50
6. Step 6: Final answer
   x = 82,422.78