Finding the Third Proportional to 89,213.25 and 128,231.25

Step by Step Solution

1. Step 1: Write the proportion equation
   89,213.25 : 128,231.25 = 128,231.25 : x
2. Step 2: Convert to fraction form
   89,213.25/128,231.25 = 128,231.25/x
3. Step 3: Cross multiply
   89,213.25x = 128,231.25 × 128,231.25
4. Step 4: Simplify right side
   89,213.25x = 16,443,253,476.56
5. Step 5: Solve for x
   x = 16,443,253,476.56/89,213.25
6. Step 6: Final answer
   x = 184,314.03