Finding the Fourth Proportional to 161,105.34, 222,319.22 and 89,490

Step by Step Solution

1. Step 1: Write the proportion equation
   161,105.34 : 222,319.22 = 89,490 : x
2. Step 2: Convert to fraction form
   161,105.34/222,319.22 = 89,490/x
3. Step 3: Cross multiply
   161,105.34x = 222,319.22 × 89,490
4. Step 4: Simplify right side
   161,105.34x = 19,895,346,997.80
5. Step 5: Solve for x
   x = 19,895,346,997.80/161,105.34
6. Step 6: Final answer
   x = 123,492.78