Finding the Third Proportional to 120,915 and 190,648.50

Step by Step Solution

1. Step 1: Write the proportion equation
   120,915 : 190,648.50 = 190,648.50 : x
2. Step 2: Convert to fraction form
   120,915/190,648.50 = 190,648.50/x
3. Step 3: Cross multiply
   120,915x = 190,648.50 × 190,648.50
4. Step 4: Simplify right side
   120,915x = 36,346,850,552.25
5. Step 5: Solve for x
   x = 36,346,850,552.25/120,915
6. Step 6: Final answer
   x = 300,598.36