Finding the Third Proportional to 108,990 and 150,090

Step by Step Solution

1. Step 1: Write the proportion equation
   108,990 : 150,090 = 150,090 : x
2. Step 2: Convert to fraction form
   108,990/150,090 = 150,090/x
3. Step 3: Cross multiply
   108,990x = 150,090 × 150,090
4. Step 4: Simplify right side
   108,990x = 22,527,008,100
5. Step 5: Solve for x
   x = 22,527,008,100/108,990
6. Step 6: Final answer
   x = 206,688.76