Finding the Third Proportional to 758,642 and 1,139,979

Step by Step Solution

1. Step 1: Write the proportion equation
   758,642 : 1,139,979 = 1,139,979 : x
2. Step 2: Convert to fraction form
   758,642/1,139,979 = 1,139,979/x
3. Step 3: Cross multiply
   758,642x = 1,139,979 × 1,139,979
4. Step 4: Simplify right side
   758,642x = 1,299,552,120,441
5. Step 5: Solve for x
   x = 1,299,552,120,441/758,642
6. Step 6: Final answer
   x = 1,712,997.86