Finding the Third Proportional to 3,918.38 and 8,368.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,918.38 : 8,368.31 = 8,368.31 : x
2. Step 2: Convert to fraction form
   3,918.38/8,368.31 = 8,368.31/x
3. Step 3: Cross multiply
   3,918.38x = 8,368.31 × 8,368.31
4. Step 4: Simplify right side
   3,918.38x = 70,028,654.10
5. Step 5: Solve for x
   x = 70,028,654.10/3,918.38
6. Step 6: Final answer
   x = 17,871.86