Finding the Third Proportional to 409,612.50 and 635,985

Step by Step Solution

1. Step 1: Write the proportion equation
   409,612.50 : 635,985 = 635,985 : x
2. Step 2: Convert to fraction form
   409,612.50/635,985 = 635,985/x
3. Step 3: Cross multiply
   409,612.50x = 635,985 × 635,985
4. Step 4: Simplify right side
   409,612.50x = 404,476,920,225
5. Step 5: Solve for x
   x = 404,476,920,225/409,612.50
6. Step 6: Final answer
   x = 987,462.35