Finding the Fourth Proportional to 105,727.47, 145,900.76 and 60,405.27

Step by Step Solution

1. Step 1: Write the proportion equation
   105,727.47 : 145,900.76 = 60,405.27 : x
2. Step 2: Convert to fraction form
   105,727.47/145,900.76 = 60,405.27/x
3. Step 3: Cross multiply
   105,727.47x = 145,900.76 × 60,405.27
4. Step 4: Simplify right side
   105,727.47x = 8,813,174,498.98
5. Step 5: Solve for x
   x = 8,813,174,498.98/105,727.47
6. Step 6: Final answer
   x = 83,357.47