Finding the Third Proportional to 6,889,123 and 11,343,667.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,889,123 : 11,343,667.50 = 11,343,667.50 : x
2. Step 2: Convert to fraction form
   6,889,123/11,343,667.50 = 11,343,667.50/x
3. Step 3: Cross multiply
   6,889,123x = 11,343,667.50 × 11,343,667.50
4. Step 4: Simplify right side
   6,889,123x = 128,678,792,350,556.25
5. Step 5: Solve for x
   x = 128,678,792,350,556.25/6,889,123
6. Step 6: Final answer
   x = 18,678,544.77