Finding the Third Proportional to 691,185 and 1,036,778

Step by Step Solution

1. Step 1: Write the proportion equation
   691,185 : 1,036,778 = 1,036,778 : x
2. Step 2: Convert to fraction form
   691,185/1,036,778 = 1,036,778/x
3. Step 3: Cross multiply
   691,185x = 1,036,778 × 1,036,778
4. Step 4: Simplify right side
   691,185x = 1,074,908,621,284
5. Step 5: Solve for x
   x = 1,074,908,621,284/691,185
6. Step 6: Final answer
   x = 1,555,167.75