Finding the Third Proportional to 420,619,911 and 973,658,983.50

Step by Step Solution

1. Step 1: Write the proportion equation
   420,619,911 : 973,658,983.50 = 973,658,983.50 : x
2. Step 2: Convert to fraction form
   420,619,911/973,658,983.50 = 973,658,983.50/x
3. Step 3: Cross multiply
   420,619,911x = 973,658,983.50 × 973,658,983.50
4. Step 4: Simplify right side
   420,619,911x = 948,011,816,150,253,312
5. Step 5: Solve for x
   x = 948,011,816,150,253,312/420,619,911
6. Step 6: Final answer
   x = 2,253,844,364.85