Finding the Fourth Proportional to 160,636.82, 221,680.05 and 89,018

Step by Step Solution

1. Step 1: Write the proportion equation
   160,636.82 : 221,680.05 = 89,018 : x
2. Step 2: Convert to fraction form
   160,636.82/221,680.05 = 89,018/x
3. Step 3: Cross multiply
   160,636.82x = 221,680.05 × 89,018
4. Step 4: Simplify right side
   160,636.82x = 19,733,514,690.90
5. Step 5: Solve for x
   x = 19,733,514,690.90/160,636.82
6. Step 6: Final answer
   x = 122,845.53