Finding the Third Proportional to 89,019 and 210,139.31

Step by Step Solution

1. Step 1: Write the proportion equation
   89,019 : 210,139.31 = 210,139.31 : x
2. Step 2: Convert to fraction form
   89,019/210,139.31 = 210,139.31/x
3. Step 3: Cross multiply
   89,019x = 210,139.31 × 210,139.31
4. Step 4: Simplify right side
   89,019x = 44,158,530,657.97
5. Step 5: Solve for x
   x = 44,158,530,657.97/89,019
6. Step 6: Final answer
   x = 496,057.37