Finding the Third Proportional to 620,270 and 1,315,820

Step by Step Solution

1. Step 1: Write the proportion equation
   620,270 : 1,315,820 = 1,315,820 : x
2. Step 2: Convert to fraction form
   620,270/1,315,820 = 1,315,820/x
3. Step 3: Cross multiply
   620,270x = 1,315,820 × 1,315,820
4. Step 4: Simplify right side
   620,270x = 1,731,382,272,400
5. Step 5: Solve for x
   x = 1,731,382,272,400/620,270
6. Step 6: Final answer
   x = 2,791,336.47