Finding the Third Proportional to 133,109 and 290,890

Step by Step Solution

1. Step 1: Write the proportion equation
   133,109 : 290,890 = 290,890 : x
2. Step 2: Convert to fraction form
   133,109/290,890 = 290,890/x
3. Step 3: Cross multiply
   133,109x = 290,890 × 290,890
4. Step 4: Simplify right side
   133,109x = 84,616,992,100
5. Step 5: Solve for x
   x = 84,616,992,100/133,109
6. Step 6: Final answer
   x = 635,697.00