Finding the Third Proportional to 187,788 and 405,066

Step by Step Solution

1. Step 1: Write the proportion equation
   187,788 : 405,066 = 405,066 : x
2. Step 2: Convert to fraction form
   187,788/405,066 = 405,066/x
3. Step 3: Cross multiply
   187,788x = 405,066 × 405,066
4. Step 4: Simplify right side
   187,788x = 164,078,464,356
5. Step 5: Solve for x
   x = 164,078,464,356/187,788
6. Step 6: Final answer
   x = 873,743.07