Finding the Third Proportional to 178,947,716 and 391,389,064

Step by Step Solution

1. Step 1: Write the proportion equation
   178,947,716 : 391,389,064 = 391,389,064 : x
2. Step 2: Convert to fraction form
   178,947,716/391,389,064 = 391,389,064/x
3. Step 3: Cross multiply
   178,947,716x = 391,389,064 × 391,389,064
4. Step 4: Simplify right side
   178,947,716x = 153,185,399,418,796,096
5. Step 5: Solve for x
   x = 153,185,399,418,796,096/178,947,716
6. Step 6: Final answer
   x = 856,034,392.85