Finding the Third Proportional to 289,071 and 635,807.25

Step by Step Solution

1. Step 1: Write the proportion equation
   289,071 : 635,807.25 = 635,807.25 : x
2. Step 2: Convert to fraction form
   289,071/635,807.25 = 635,807.25/x
3. Step 3: Cross multiply
   289,071x = 635,807.25 × 635,807.25
4. Step 4: Simplify right side
   289,071x = 404,250,859,152.56
5. Step 5: Solve for x
   x = 404,250,859,152.56/289,071
6. Step 6: Final answer
   x = 1,398,448.34