Finding the Third Proportional to 181,165.50 and 390,231

Step by Step Solution

1. Step 1: Write the proportion equation
   181,165.50 : 390,231 = 390,231 : x
2. Step 2: Convert to fraction form
   181,165.50/390,231 = 390,231/x
3. Step 3: Cross multiply
   181,165.50x = 390,231 × 390,231
4. Step 4: Simplify right side
   181,165.50x = 152,280,233,361
5. Step 5: Solve for x
   x = 152,280,233,361/181,165.50
6. Step 6: Final answer
   x = 840,558.68