Finding the Third Proportional to 181,159.50 and 390,021

Step by Step Solution

1. Step 1: Write the proportion equation
   181,159.50 : 390,021 = 390,021 : x
2. Step 2: Convert to fraction form
   181,159.50/390,021 = 390,021/x
3. Step 3: Cross multiply
   181,159.50x = 390,021 × 390,021
4. Step 4: Simplify right side
   181,159.50x = 152,116,380,441
5. Step 5: Solve for x
   x = 152,116,380,441/181,159.50
6. Step 6: Final answer
   x = 839,682.05