Finding the Third Proportional to 425,763 and 640,422.28

Step by Step Solution

1. Step 1: Write the proportion equation
   425,763 : 640,422.28 = 640,422.28 : x
2. Step 2: Convert to fraction form
   425,763/640,422.28 = 640,422.28/x
3. Step 3: Cross multiply
   425,763x = 640,422.28 × 640,422.28
4. Step 4: Simplify right side
   425,763x = 410,140,698,321.45
5. Step 5: Solve for x
   x = 410,140,698,321.45/425,763
6. Step 6: Final answer
   x = 963,307.52