Finding the Third Proportional to 90,454 and 189,161

Step by Step Solution

1. Step 1: Write the proportion equation
   90,454 : 189,161 = 189,161 : x
2. Step 2: Convert to fraction form
   90,454/189,161 = 189,161/x
3. Step 3: Cross multiply
   90,454x = 189,161 × 189,161
4. Step 4: Simplify right side
   90,454x = 35,781,883,921
5. Step 5: Solve for x
   x = 35,781,883,921/90,454
6. Step 6: Final answer
   x = 395,581.00