Finding the Third Proportional to 90,099 and 189,054

Step by Step Solution

1. Step 1: Write the proportion equation
   90,099 : 189,054 = 189,054 : x
2. Step 2: Convert to fraction form
   90,099/189,054 = 189,054/x
3. Step 3: Cross multiply
   90,099x = 189,054 × 189,054
4. Step 4: Simplify right side
   90,099x = 35,741,414,916
5. Step 5: Solve for x
   x = 35,741,414,916/90,099
6. Step 6: Final answer
   x = 396,690.47