Finding the Third Proportional to 58,891 and 128,997.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,891 : 128,997.50 = 128,997.50 : x
2. Step 2: Convert to fraction form
   58,891/128,997.50 = 128,997.50/x
3. Step 3: Cross multiply
   58,891x = 128,997.50 × 128,997.50
4. Step 4: Simplify right side
   58,891x = 16,640,355,006.25
5. Step 5: Solve for x
   x = 16,640,355,006.25/58,891
6. Step 6: Final answer
   x = 282,561.94