Finding the Third Proportional to 8,405,968 and 13,312,680

Step by Step Solution

1. Step 1: Write the proportion equation
   8,405,968 : 13,312,680 = 13,312,680 : x
2. Step 2: Convert to fraction form
   8,405,968/13,312,680 = 13,312,680/x
3. Step 3: Cross multiply
   8,405,968x = 13,312,680 × 13,312,680
4. Step 4: Simplify right side
   8,405,968x = 177,227,448,782,400
5. Step 5: Solve for x
   x = 177,227,448,782,400/8,405,968
6. Step 6: Final answer
   x = 21,083,526.46