Finding the Third Proportional to 758,640 and 1,139,976

Step by Step Solution

1. Step 1: Write the proportion equation
   758,640 : 1,139,976 = 1,139,976 : x
2. Step 2: Convert to fraction form
   758,640/1,139,976 = 1,139,976/x
3. Step 3: Cross multiply
   758,640x = 1,139,976 × 1,139,976
4. Step 4: Simplify right side
   758,640x = 1,299,545,280,576
5. Step 5: Solve for x
   x = 1,299,545,280,576/758,640
6. Step 6: Final answer
   x = 1,712,993.36