Finding the Fourth Proportional to 160,786.56, 221,898.72 and 89,189.72

Step by Step Solution

1. Step 1: Write the proportion equation
   160,786.56 : 221,898.72 = 89,189.72 : x
2. Step 2: Convert to fraction form
   160,786.56/221,898.72 = 89,189.72/x
3. Step 3: Cross multiply
   160,786.56x = 221,898.72 × 89,189.72
4. Step 4: Simplify right side
   160,786.56x = 19,791,084,705.16
5. Step 5: Solve for x
   x = 19,791,084,705.16/160,786.56
6. Step 6: Final answer
   x = 123,089.17