Finding the Third Proportional to 338,773.50 and 668,979

Step by Step Solution

1. Step 1: Write the proportion equation
   338,773.50 : 668,979 = 668,979 : x
2. Step 2: Convert to fraction form
   338,773.50/668,979 = 668,979/x
3. Step 3: Cross multiply
   338,773.50x = 668,979 × 668,979
4. Step 4: Simplify right side
   338,773.50x = 447,532,902,441
5. Step 5: Solve for x
   x = 447,532,902,441/338,773.50
6. Step 6: Final answer
   x = 1,321,038.70