Finding the Third Proportional to 90,373.50 and 137,911.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,373.50 : 137,911.50 = 137,911.50 : x
2. Step 2: Convert to fraction form
   90,373.50/137,911.50 = 137,911.50/x
3. Step 3: Cross multiply
   90,373.50x = 137,911.50 × 137,911.50
4. Step 4: Simplify right side
   90,373.50x = 19,019,581,832.25
5. Step 5: Solve for x
   x = 19,019,581,832.25/90,373.50
6. Step 6: Final answer
   x = 210,455.30