Finding the Third Proportional to 58,438.50 and 128,001

Step by Step Solution

1. Step 1: Write the proportion equation
   58,438.50 : 128,001 = 128,001 : x
2. Step 2: Convert to fraction form
   58,438.50/128,001 = 128,001/x
3. Step 3: Cross multiply
   58,438.50x = 128,001 × 128,001
4. Step 4: Simplify right side
   58,438.50x = 16,384,256,001
5. Step 5: Solve for x
   x = 16,384,256,001/58,438.50
6. Step 6: Final answer
   x = 280,367.50