Finding the Third Proportional to 120,540,784.50 and 261,630,648

Step by Step Solution

1. Step 1: Write the proportion equation
   120,540,784.50 : 261,630,648 = 261,630,648 : x
2. Step 2: Convert to fraction form
   120,540,784.50/261,630,648 = 261,630,648/x
3. Step 3: Cross multiply
   120,540,784.50x = 261,630,648 × 261,630,648
4. Step 4: Simplify right side
   120,540,784.50x = 68,450,595,972,899,904
5. Step 5: Solve for x
   x = 68,450,595,972,899,904/120,540,784.50
6. Step 6: Final answer
   x = 567,862,539.28