Finding the Fourth Proportional to 105,759.47, 145,865.57 and 65,495.59

Step by Step Solution

1. Step 1: Write the proportion equation
   105,759.47 : 145,865.57 = 65,495.59 : x
2. Step 2: Convert to fraction form
   105,759.47/145,865.57 = 65,495.59/x
3. Step 3: Cross multiply
   105,759.47x = 145,865.57 × 65,495.59
4. Step 4: Simplify right side
   105,759.47x = 9,553,550,875.69
5. Step 5: Solve for x
   x = 9,553,550,875.69/105,759.47
6. Step 6: Final answer
   x = 90,332.82