Finding the Third Proportional to 90,310.50 and 137,412

Step by Step Solution

1. Step 1: Write the proportion equation
   90,310.50 : 137,412 = 137,412 : x
2. Step 2: Convert to fraction form
   90,310.50/137,412 = 137,412/x
3. Step 3: Cross multiply
   90,310.50x = 137,412 × 137,412
4. Step 4: Simplify right side
   90,310.50x = 18,882,057,744
5. Step 5: Solve for x
   x = 18,882,057,744/90,310.50
6. Step 6: Final answer
   x = 209,079.32