Finding the Third Proportional to 28,305 and 60,990

Step by Step Solution

1. Step 1: Write the proportion equation
   28,305 : 60,990 = 60,990 : x
2. Step 2: Convert to fraction form
   28,305/60,990 = 60,990/x
3. Step 3: Cross multiply
   28,305x = 60,990 × 60,990
4. Step 4: Simplify right side
   28,305x = 3,719,780,100
5. Step 5: Solve for x
   x = 3,719,780,100/28,305
6. Step 6: Final answer
   x = 131,417.77