Finding the Third Proportional to 181,007 and 390,066

Step by Step Solution

1. Step 1: Write the proportion equation
   181,007 : 390,066 = 390,066 : x
2. Step 2: Convert to fraction form
   181,007/390,066 = 390,066/x
3. Step 3: Cross multiply
   181,007x = 390,066 × 390,066
4. Step 4: Simplify right side
   181,007x = 152,151,484,356
5. Step 5: Solve for x
   x = 152,151,484,356/181,007
6. Step 6: Final answer
   x = 840,583.43