Finding the Third Proportional to 42,808 and 103,128

Step by Step Solution

1. Step 1: Write the proportion equation
   42,808 : 103,128 = 103,128 : x
2. Step 2: Convert to fraction form
   42,808/103,128 = 103,128/x
3. Step 3: Cross multiply
   42,808x = 103,128 × 103,128
4. Step 4: Simplify right side
   42,808x = 10,635,384,384
5. Step 5: Solve for x
   x = 10,635,384,384/42,808
6. Step 6: Final answer
   x = 248,443.85