Finding the Third Proportional to 644,987 and 1,506,155

Step by Step Solution

1. Step 1: Write the proportion equation
   644,987 : 1,506,155 = 1,506,155 : x
2. Step 2: Convert to fraction form
   644,987/1,506,155 = 1,506,155/x
3. Step 3: Cross multiply
   644,987x = 1,506,155 × 1,506,155
4. Step 4: Simplify right side
   644,987x = 2,268,502,884,025
5. Step 5: Solve for x
   x = 2,268,502,884,025/644,987
6. Step 6: Final answer
   x = 3,517,129.62