Finding the Third Proportional to 137,128.50 and 208,341

Step by Step Solution

1. Step 1: Write the proportion equation
   137,128.50 : 208,341 = 208,341 : x
2. Step 2: Convert to fraction form
   137,128.50/208,341 = 208,341/x
3. Step 3: Cross multiply
   137,128.50x = 208,341 × 208,341
4. Step 4: Simplify right side
   137,128.50x = 43,405,972,281
5. Step 5: Solve for x
   x = 43,405,972,281/137,128.50
6. Step 6: Final answer
   x = 316,535.02