Finding the Third Proportional to 86,911.50 and 190,426.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,911.50 : 190,426.50 = 190,426.50 : x
2. Step 2: Convert to fraction form
   86,911.50/190,426.50 = 190,426.50/x
3. Step 3: Cross multiply
   86,911.50x = 190,426.50 × 190,426.50
4. Step 4: Simplify right side
   86,911.50x = 36,262,251,902.25
5. Step 5: Solve for x
   x = 36,262,251,902.25/86,911.50
6. Step 6: Final answer
   x = 417,231.92