Finding the Third Proportional to 618,507 and 1,312,830

Step by Step Solution

1. Step 1: Write the proportion equation
   618,507 : 1,312,830 = 1,312,830 : x
2. Step 2: Convert to fraction form
   618,507/1,312,830 = 1,312,830/x
3. Step 3: Cross multiply
   618,507x = 1,312,830 × 1,312,830
4. Step 4: Simplify right side
   618,507x = 1,723,522,608,900
5. Step 5: Solve for x
   x = 1,723,522,608,900/618,507
6. Step 6: Final answer
   x = 2,786,585.45