Finding the Fourth Proportional to 105,683.97, 145,858.89 and 65,410.71

Step by Step Solution

1. Step 1: Write the proportion equation
   105,683.97 : 145,858.89 = 65,410.71 : x
2. Step 2: Convert to fraction form
   105,683.97/145,858.89 = 65,410.71/x
3. Step 3: Cross multiply
   105,683.97x = 145,858.89 × 65,410.71
4. Step 4: Simplify right side
   105,683.97x = 9,540,733,554.71
5. Step 5: Solve for x
   x = 9,540,733,554.71/105,683.97
6. Step 6: Final answer
   x = 90,276.07