Finding the Fourth Proportional to 116,469.78, 160,728.24 and 66,168.78

Step by Step Solution

1. Step 1: Write the proportion equation
   116,469.78 : 160,728.24 = 66,168.78 : x
2. Step 2: Convert to fraction form
   116,469.78/160,728.24 = 66,168.78/x
3. Step 3: Cross multiply
   116,469.78x = 160,728.24 × 66,168.78
4. Step 4: Simplify right side
   116,469.78x = 10,635,191,552.35
5. Step 5: Solve for x
   x = 10,635,191,552.35/116,469.78
6. Step 6: Final answer
   x = 91,312.88