Finding the Third Proportional to 180,982.50 and 390,012

Step by Step Solution

1. Step 1: Write the proportion equation
   180,982.50 : 390,012 = 390,012 : x
2. Step 2: Convert to fraction form
   180,982.50/390,012 = 390,012/x
3. Step 3: Cross multiply
   180,982.50x = 390,012 × 390,012
4. Step 4: Simplify right side
   180,982.50x = 152,109,360,144
5. Step 5: Solve for x
   x = 152,109,360,144/180,982.50
6. Step 6: Final answer
   x = 840,464.47