Finding the Fourth Proportional to 116,645.48, 160,975.86 and 65,661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   116,645.48 : 160,975.86 = 65,661.50 : x
2. Step 2: Convert to fraction form
   116,645.48/160,975.86 = 65,661.50/x
3. Step 3: Cross multiply
   116,645.48x = 160,975.86 × 65,661.50
4. Step 4: Simplify right side
   116,645.48x = 10,569,916,431.39
5. Step 5: Solve for x
   x = 10,569,916,431.39/116,645.48
6. Step 6: Final answer
   x = 90,615.74