Finding the Third Proportional to 670,570 and 1,307,420

Step by Step Solution

1. Step 1: Write the proportion equation
   670,570 : 1,307,420 = 1,307,420 : x
2. Step 2: Convert to fraction form
   670,570/1,307,420 = 1,307,420/x
3. Step 3: Cross multiply
   670,570x = 1,307,420 × 1,307,420
4. Step 4: Simplify right side
   670,570x = 1,709,347,056,400
5. Step 5: Solve for x
   x = 1,709,347,056,400/670,570
6. Step 6: Final answer
   x = 2,549,095.63