Finding the Third Proportional to 51,043,864 and 78,458,078

Step by Step Solution

1. Step 1: Write the proportion equation
   51,043,864 : 78,458,078 = 78,458,078 : x
2. Step 2: Convert to fraction form
   51,043,864/78,458,078 = 78,458,078/x
3. Step 3: Cross multiply
   51,043,864x = 78,458,078 × 78,458,078
4. Step 4: Simplify right side
   51,043,864x = 6,155,670,003,454,084
5. Step 5: Solve for x
   x = 6,155,670,003,454,084/51,043,864
6. Step 6: Final answer
   x = 120,595,690.08