Finding the Third Proportional to 644,978 and 1,506,132

Step by Step Solution

1. Step 1: Write the proportion equation
   644,978 : 1,506,132 = 1,506,132 : x
2. Step 2: Convert to fraction form
   644,978/1,506,132 = 1,506,132/x
3. Step 3: Cross multiply
   644,978x = 1,506,132 × 1,506,132
4. Step 4: Simplify right side
   644,978x = 2,268,433,601,424
5. Step 5: Solve for x
   x = 2,268,433,601,424/644,978
6. Step 6: Final answer
   x = 3,517,071.28