Finding the Third Proportional to 18,985.50 and 30,300.75

Step by Step Solution

1. Step 1: Write the proportion equation
   18,985.50 : 30,300.75 = 30,300.75 : x
2. Step 2: Convert to fraction form
   18,985.50/30,300.75 = 30,300.75/x
3. Step 3: Cross multiply
   18,985.50x = 30,300.75 × 30,300.75
4. Step 4: Simplify right side
   18,985.50x = 918,135,450.56
5. Step 5: Solve for x
   x = 918,135,450.56/18,985.50
6. Step 6: Final answer
   x = 48,359.82