Finding the Third Proportional to 191,603 and 290,055

Step by Step Solution

1. Step 1: Write the proportion equation
   191,603 : 290,055 = 290,055 : x
2. Step 2: Convert to fraction form
   191,603/290,055 = 290,055/x
3. Step 3: Cross multiply
   191,603x = 290,055 × 290,055
4. Step 4: Simplify right side
   191,603x = 84,131,903,025
5. Step 5: Solve for x
   x = 84,131,903,025/191,603
6. Step 6: Final answer
   x = 439,094.92