Finding the Third Proportional to 460,308 and 621,910

Step by Step Solution

1. Step 1: Write the proportion equation
   460,308 : 621,910 = 621,910 : x
2. Step 2: Convert to fraction form
   460,308/621,910 = 621,910/x
3. Step 3: Cross multiply
   460,308x = 621,910 × 621,910
4. Step 4: Simplify right side
   460,308x = 386,772,048,100
5. Step 5: Solve for x
   x = 386,772,048,100/460,308
6. Step 6: Final answer
   x = 840,246.20