Finding the Third Proportional to 87,668,817 and 139,621,337.50

Step by Step Solution

1. Step 1: Write the proportion equation
   87,668,817 : 139,621,337.50 = 139,621,337.50 : x
2. Step 2: Convert to fraction form
   87,668,817/139,621,337.50 = 139,621,337.50/x
3. Step 3: Cross multiply
   87,668,817x = 139,621,337.50 × 139,621,337.50
4. Step 4: Simplify right side
   87,668,817x = 19,494,117,885,288,908
5. Step 5: Solve for x
   x = 19,494,117,885,288,908/87,668,817
6. Step 6: Final answer
   x = 222,360,909.53