Finding the Third Proportional to 100,489 and 155,456.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100,489 : 155,456.50 = 155,456.50 : x
2. Step 2: Convert to fraction form
   100,489/155,456.50 = 155,456.50/x
3. Step 3: Cross multiply
   100,489x = 155,456.50 × 155,456.50
4. Step 4: Simplify right side
   100,489x = 24,166,723,392.25
5. Step 5: Solve for x
   x = 24,166,723,392.25/100,489
6. Step 6: Final answer
   x = 240,491.23