Finding the Third Proportional to 50,766,680 and 78,478,815

Step by Step Solution

1. Step 1: Write the proportion equation
   50,766,680 : 78,478,815 = 78,478,815 : x
2. Step 2: Convert to fraction form
   50,766,680/78,478,815 = 78,478,815/x
3. Step 3: Cross multiply
   50,766,680x = 78,478,815 × 78,478,815
4. Step 4: Simplify right side
   50,766,680x = 6,158,924,403,804,225
5. Step 5: Solve for x
   x = 6,158,924,403,804,225/50,766,680
6. Step 6: Final answer
   x = 121,318,242.67