Finding the Third Proportional to 368,112 and 788,672

Step by Step Solution

1. Step 1: Write the proportion equation
   368,112 : 788,672 = 788,672 : x
2. Step 2: Convert to fraction form
   368,112/788,672 = 788,672/x
3. Step 3: Cross multiply
   368,112x = 788,672 × 788,672
4. Step 4: Simplify right side
   368,112x = 622,003,523,584
5. Step 5: Solve for x
   x = 622,003,523,584/368,112
6. Step 6: Final answer
   x = 1,689,712.71