Finding the Third Proportional to 30,180.75 and 71,020.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,180.75 : 71,020.50 = 71,020.50 : x
2. Step 2: Convert to fraction form
   30,180.75/71,020.50 = 71,020.50/x
3. Step 3: Cross multiply
   30,180.75x = 71,020.50 × 71,020.50
4. Step 4: Simplify right side
   30,180.75x = 5,043,911,420.25
5. Step 5: Solve for x
   x = 5,043,911,420.25/30,180.75
6. Step 6: Final answer
   x = 167,123.46