Finding the Third Proportional to 590,780 and 1,288,488

Step by Step Solution

1. Step 1: Write the proportion equation
   590,780 : 1,288,488 = 1,288,488 : x
2. Step 2: Convert to fraction form
   590,780/1,288,488 = 1,288,488/x
3. Step 3: Cross multiply
   590,780x = 1,288,488 × 1,288,488
4. Step 4: Simplify right side
   590,780x = 1,660,201,326,144
5. Step 5: Solve for x
   x = 1,660,201,326,144/590,780
6. Step 6: Final answer
   x = 2,810,185.39