Finding the Fourth Proportional to 161,405.10, 222,733.94 and 89,784.50

Step by Step Solution

1. Step 1: Write the proportion equation
   161,405.10 : 222,733.94 = 89,784.50 : x
2. Step 2: Convert to fraction form
   161,405.10/222,733.94 = 89,784.50/x
3. Step 3: Cross multiply
   161,405.10x = 222,733.94 × 89,784.50
4. Step 4: Simplify right side
   161,405.10x = 19,998,053,873.34
5. Step 5: Solve for x
   x = 19,998,053,873.34/161,405.10
6. Step 6: Final answer
   x = 123,899.76