Finding the Third Proportional to 191,673 and 290,196

Step by Step Solution

1. Step 1: Write the proportion equation
   191,673 : 290,196 = 290,196 : x
2. Step 2: Convert to fraction form
   191,673/290,196 = 290,196/x
3. Step 3: Cross multiply
   191,673x = 290,196 × 290,196
4. Step 4: Simplify right side
   191,673x = 84,213,718,416
5. Step 5: Solve for x
   x = 84,213,718,416/191,673
6. Step 6: Final answer
   x = 439,361.40