Finding the Third Proportional to 861,978 and 1,364,229

Step by Step Solution

1. Step 1: Write the proportion equation
   861,978 : 1,364,229 = 1,364,229 : x
2. Step 2: Convert to fraction form
   861,978/1,364,229 = 1,364,229/x
3. Step 3: Cross multiply
   861,978x = 1,364,229 × 1,364,229
4. Step 4: Simplify right side
   861,978x = 1,861,120,764,441
5. Step 5: Solve for x
   x = 1,861,120,764,441/861,978
6. Step 6: Final answer
   x = 2,159,127.92