Finding the Third Proportional to 765,136 and 1,123,128

Step by Step Solution

1. Step 1: Write the proportion equation
   765,136 : 1,123,128 = 1,123,128 : x
2. Step 2: Convert to fraction form
   765,136/1,123,128 = 1,123,128/x
3. Step 3: Cross multiply
   765,136x = 1,123,128 × 1,123,128
4. Step 4: Simplify right side
   765,136x = 1,261,416,504,384
5. Step 5: Solve for x
   x = 1,261,416,504,384/765,136
6. Step 6: Final answer
   x = 1,648,617.38