Finding the Third Proportional to 276,378 and 585,969.75

Step by Step Solution

1. Step 1: Write the proportion equation
   276,378 : 585,969.75 = 585,969.75 : x
2. Step 2: Convert to fraction form
   276,378/585,969.75 = 585,969.75/x
3. Step 3: Cross multiply
   276,378x = 585,969.75 × 585,969.75
4. Step 4: Simplify right side
   276,378x = 343,360,547,915.06
5. Step 5: Solve for x
   x = 343,360,547,915.06/276,378
6. Step 6: Final answer
   x = 1,242,358.47