Finding the Fourth Proportional to 160,729.72, 221,812.38 and 89,105.47

Step by Step Solution

1. Step 1: Write the proportion equation
   160,729.72 : 221,812.38 = 89,105.47 : x
2. Step 2: Convert to fraction form
   160,729.72/221,812.38 = 89,105.47/x
3. Step 3: Cross multiply
   160,729.72x = 221,812.38 × 89,105.47
4. Step 4: Simplify right side
   160,729.72x = 19,764,696,371.72
5. Step 5: Solve for x
   x = 19,764,696,371.72/160,729.72
6. Step 6: Final answer
   x = 122,968.52