Finding the Third Proportional to 290,550 and 435,810

Step by Step Solution

1. Step 1: Write the proportion equation
   290,550 : 435,810 = 435,810 : x
2. Step 2: Convert to fraction form
   290,550/435,810 = 435,810/x
3. Step 3: Cross multiply
   290,550x = 435,810 × 435,810
4. Step 4: Simplify right side
   290,550x = 189,930,356,100
5. Step 5: Solve for x
   x = 189,930,356,100/290,550
6. Step 6: Final answer
   x = 653,692.50