Finding the Third Proportional to 612,386 and 1,329,928

Step by Step Solution

1. Step 1: Write the proportion equation
   612,386 : 1,329,928 = 1,329,928 : x
2. Step 2: Convert to fraction form
   612,386/1,329,928 = 1,329,928/x
3. Step 3: Cross multiply
   612,386x = 1,329,928 × 1,329,928
4. Step 4: Simplify right side
   612,386x = 1,768,708,485,184
5. Step 5: Solve for x
   x = 1,768,708,485,184/612,386
6. Step 6: Final answer
   x = 2,888,224.89