Finding the Fourth Proportional to 116,205.72, 160,361.90 and 65,219.64

Step by Step Solution

1. Step 1: Write the proportion equation
   116,205.72 : 160,361.90 = 65,219.64 : x
2. Step 2: Convert to fraction form
   116,205.72/160,361.90 = 65,219.64/x
3. Step 3: Cross multiply
   116,205.72x = 160,361.90 × 65,219.64
4. Step 4: Simplify right side
   116,205.72x = 10,458,745,387.72
5. Step 5: Solve for x
   x = 10,458,745,387.72/116,205.72
6. Step 6: Final answer
   x = 90,001.98