Finding the Third Proportional to 7,981,590 and 12,171,667.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,981,590 : 12,171,667.50 = 12,171,667.50 : x
2. Step 2: Convert to fraction form
   7,981,590/12,171,667.50 = 12,171,667.50/x
3. Step 3: Cross multiply
   7,981,590x = 12,171,667.50 × 12,171,667.50
4. Step 4: Simplify right side
   7,981,590x = 148,149,489,730,556.25
5. Step 5: Solve for x
   x = 148,149,489,730,556.25/7,981,590
6. Step 6: Final answer
   x = 18,561,400.64