Finding the Third Proportional to 191,609 and 290,064

Step by Step Solution

1. Step 1: Write the proportion equation
   191,609 : 290,064 = 290,064 : x
2. Step 2: Convert to fraction form
   191,609/290,064 = 290,064/x
3. Step 3: Cross multiply
   191,609x = 290,064 × 290,064
4. Step 4: Simplify right side
   191,609x = 84,137,124,096
5. Step 5: Solve for x
   x = 84,137,124,096/191,609
6. Step 6: Final answer
   x = 439,108.41