Finding the Third Proportional to 290,781 and 635,566.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,781 : 635,566.50 = 635,566.50 : x
2. Step 2: Convert to fraction form
   290,781/635,566.50 = 635,566.50/x
3. Step 3: Cross multiply
   290,781x = 635,566.50 × 635,566.50
4. Step 4: Simplify right side
   290,781x = 403,944,775,922.25
5. Step 5: Solve for x
   x = 403,944,775,922.25/290,781
6. Step 6: Final answer
   x = 1,389,171.84