Finding the Third Proportional to 978,538 and 1,377,991

Step by Step Solution

1. Step 1: Write the proportion equation
   978,538 : 1,377,991 = 1,377,991 : x
2. Step 2: Convert to fraction form
   978,538/1,377,991 = 1,377,991/x
3. Step 3: Cross multiply
   978,538x = 1,377,991 × 1,377,991
4. Step 4: Simplify right side
   978,538x = 1,898,859,196,081
5. Step 5: Solve for x
   x = 1,898,859,196,081/978,538
6. Step 6: Final answer
   x = 1,940,506.34