Finding the Third Proportional to 136,339 and 209,269.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,339 : 209,269.50 = 209,269.50 : x
2. Step 2: Convert to fraction form
   136,339/209,269.50 = 209,269.50/x
3. Step 3: Cross multiply
   136,339x = 209,269.50 × 209,269.50
4. Step 4: Simplify right side
   136,339x = 43,793,723,630.25
5. Step 5: Solve for x
   x = 43,793,723,630.25/136,339
6. Step 6: Final answer
   x = 321,212.01