Finding the Third Proportional to 181,156.50 and 390,015

Step by Step Solution

1. Step 1: Write the proportion equation
   181,156.50 : 390,015 = 390,015 : x
2. Step 2: Convert to fraction form
   181,156.50/390,015 = 390,015/x
3. Step 3: Cross multiply
   181,156.50x = 390,015 × 390,015
4. Step 4: Simplify right side
   181,156.50x = 152,111,700,225
5. Step 5: Solve for x
   x = 152,111,700,225/181,156.50
6. Step 6: Final answer
   x = 839,670.12