Finding the Third Proportional to 90,054 and 208,458

Step by Step Solution

1. Step 1: Write the proportion equation
   90,054 : 208,458 = 208,458 : x
2. Step 2: Convert to fraction form
   90,054/208,458 = 208,458/x
3. Step 3: Cross multiply
   90,054x = 208,458 × 208,458
4. Step 4: Simplify right side
   90,054x = 43,454,737,764
5. Step 5: Solve for x
   x = 43,454,737,764/90,054
6. Step 6: Final answer
   x = 482,540.90