Finding the Third Proportional to 774,378 and 1,173,240

Step by Step Solution

1. Step 1: Write the proportion equation
   774,378 : 1,173,240 = 1,173,240 : x
2. Step 2: Convert to fraction form
   774,378/1,173,240 = 1,173,240/x
3. Step 3: Cross multiply
   774,378x = 1,173,240 × 1,173,240
4. Step 4: Simplify right side
   774,378x = 1,376,492,097,600
5. Step 5: Solve for x
   x = 1,376,492,097,600/774,378
6. Step 6: Final answer
   x = 1,777,545.46