Finding the Third Proportional to 646,566.75 and 978,826.50

Step by Step Solution

1. Step 1: Write the proportion equation
   646,566.75 : 978,826.50 = 978,826.50 : x
2. Step 2: Convert to fraction form
   646,566.75/978,826.50 = 978,826.50/x
3. Step 3: Cross multiply
   646,566.75x = 978,826.50 × 978,826.50
4. Step 4: Simplify right side
   646,566.75x = 958,101,317,102.25
5. Step 5: Solve for x
   x = 958,101,317,102.25/646,566.75
6. Step 6: Final answer
   x = 1,481,828.93