Finding the Third Proportional to 51,043,664 and 78,457,800

Step by Step Solution

1. Step 1: Write the proportion equation
   51,043,664 : 78,457,800 = 78,457,800 : x
2. Step 2: Convert to fraction form
   51,043,664/78,457,800 = 78,457,800/x
3. Step 3: Cross multiply
   51,043,664x = 78,457,800 × 78,457,800
4. Step 4: Simplify right side
   51,043,664x = 6,155,626,380,840,000
5. Step 5: Solve for x
   x = 6,155,626,380,840,000/51,043,664
6. Step 6: Final answer
   x = 120,595,307.99