Finding the Third Proportional to 19,072.18 and 38,663.34

Step by Step Solution

1. Step 1: Write the proportion equation
   19,072.18 : 38,663.34 = 38,663.34 : x
2. Step 2: Convert to fraction form
   19,072.18/38,663.34 = 38,663.34/x
3. Step 3: Cross multiply
   19,072.18x = 38,663.34 × 38,663.34
4. Step 4: Simplify right side
   19,072.18x = 1,494,853,923.39
5. Step 5: Solve for x
   x = 1,494,853,923.39/19,072.18
6. Step 6: Final answer
   x = 78,378.77