Finding the Third Proportional to 426,963 and 618,412.50

Step by Step Solution

1. Step 1: Write the proportion equation
   426,963 : 618,412.50 = 618,412.50 : x
2. Step 2: Convert to fraction form
   426,963/618,412.50 = 618,412.50/x
3. Step 3: Cross multiply
   426,963x = 618,412.50 × 618,412.50
4. Step 4: Simplify right side
   426,963x = 382,434,020,156.25
5. Step 5: Solve for x
   x = 382,434,020,156.25/426,963
6. Step 6: Final answer
   x = 895,707.64