Finding the Third Proportional to 368,136 and 788,760

Step by Step Solution

1. Step 1: Write the proportion equation
   368,136 : 788,760 = 788,760 : x
2. Step 2: Convert to fraction form
   368,136/788,760 = 788,760/x
3. Step 3: Cross multiply
   368,136x = 788,760 × 788,760
4. Step 4: Simplify right side
   368,136x = 622,142,337,600
5. Step 5: Solve for x
   x = 622,142,337,600/368,136
6. Step 6: Final answer
   x = 1,689,979.62