Finding the Fourth Proportional to 116,419.50, 160,659.12 and 66,118.50

Step by Step Solution

1. Step 1: Write the proportion equation
   116,419.50 : 160,659.12 = 66,118.50 : x
2. Step 2: Convert to fraction form
   116,419.50/160,659.12 = 66,118.50/x
3. Step 3: Cross multiply
   116,419.50x = 160,659.12 × 66,118.50
4. Step 4: Simplify right side
   116,419.50x = 10,622,540,025.72
5. Step 5: Solve for x
   x = 10,622,540,025.72/116,419.50
6. Step 6: Final answer
   x = 91,243.65