Finding the Third Proportional to 103,670 and 215,128

Step by Step Solution

1. Step 1: Write the proportion equation
   103,670 : 215,128 = 215,128 : x
2. Step 2: Convert to fraction form
   103,670/215,128 = 215,128/x
3. Step 3: Cross multiply
   103,670x = 215,128 × 215,128
4. Step 4: Simplify right side
   103,670x = 46,280,056,384
5. Step 5: Solve for x
   x = 46,280,056,384/103,670
6. Step 6: Final answer
   x = 446,417.06