Finding the Third Proportional to 90,769.50 and 137,385

Step by Step Solution

1. Step 1: Write the proportion equation
   90,769.50 : 137,385 = 137,385 : x
2. Step 2: Convert to fraction form
   90,769.50/137,385 = 137,385/x
3. Step 3: Cross multiply
   90,769.50x = 137,385 × 137,385
4. Step 4: Simplify right side
   90,769.50x = 18,874,638,225
5. Step 5: Solve for x
   x = 18,874,638,225/90,769.50
6. Step 6: Final answer
   x = 207,940.31