Finding the Third Proportional to 406,056 and 609,116

Step by Step Solution

1. Step 1: Write the proportion equation
   406,056 : 609,116 = 609,116 : x
2. Step 2: Convert to fraction form
   406,056/609,116 = 609,116/x
3. Step 3: Cross multiply
   406,056x = 609,116 × 609,116
4. Step 4: Simplify right side
   406,056x = 371,022,301,456
5. Step 5: Solve for x
   x = 371,022,301,456/406,056
6. Step 6: Final answer
   x = 913,722.00