Finding the Third Proportional to 90,079 and 208,538.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,079 : 208,538.50 = 208,538.50 : x
2. Step 2: Convert to fraction form
   90,079/208,538.50 = 208,538.50/x
3. Step 3: Cross multiply
   90,079x = 208,538.50 × 208,538.50
4. Step 4: Simplify right side
   90,079x = 43,488,305,982.25
5. Step 5: Solve for x
   x = 43,488,305,982.25/90,079
6. Step 6: Final answer
   x = 482,779.63