Finding the Fourth Proportional to 116,648.87, 160,973.60 and 65,661.46

Step by Step Solution

1. Step 1: Write the proportion equation
   116,648.87 : 160,973.60 = 65,661.46 : x
2. Step 2: Convert to fraction form
   116,648.87/160,973.60 = 65,661.46/x
3. Step 3: Cross multiply
   116,648.87x = 160,973.60 × 65,661.46
4. Step 4: Simplify right side
   116,648.87x = 10,569,760,866.71
5. Step 5: Solve for x
   x = 10,569,760,866.71/116,648.87
6. Step 6: Final answer
   x = 90,611.78