Finding the Third Proportional to 191,605.50 and 290,059

Step by Step Solution

1. Step 1: Write the proportion equation
   191,605.50 : 290,059 = 290,059 : x
2. Step 2: Convert to fraction form
   191,605.50/290,059 = 290,059/x
3. Step 3: Cross multiply
   191,605.50x = 290,059 × 290,059
4. Step 4: Simplify right side
   191,605.50x = 84,134,223,481
5. Step 5: Solve for x
   x = 84,134,223,481/191,605.50
6. Step 6: Final answer
   x = 439,101.30