Finding the Third Proportional to 51,043,884 and 78,458,109

Step by Step Solution

1. Step 1: Write the proportion equation
   51,043,884 : 78,458,109 = 78,458,109 : x
2. Step 2: Convert to fraction form
   51,043,884/78,458,109 = 78,458,109/x
3. Step 3: Cross multiply
   51,043,884x = 78,458,109 × 78,458,109
4. Step 4: Simplify right side
   51,043,884x = 6,155,674,867,855,881
5. Step 5: Solve for x
   x = 6,155,674,867,855,881/51,043,884
6. Step 6: Final answer
   x = 120,595,738.13