Finding the Third Proportional to 209,662.50 and 279,333

Step by Step Solution

1. Step 1: Write the proportion equation
   209,662.50 : 279,333 = 279,333 : x
2. Step 2: Convert to fraction form
   209,662.50/279,333 = 279,333/x
3. Step 3: Cross multiply
   209,662.50x = 279,333 × 279,333
4. Step 4: Simplify right side
   209,662.50x = 78,026,924,889
5. Step 5: Solve for x
   x = 78,026,924,889/209,662.50
6. Step 6: Final answer
   x = 372,154.89