Finding the Third Proportional to 6,445,447 and 9,321,240

Step by Step Solution

1. Step 1: Write the proportion equation
   6,445,447 : 9,321,240 = 9,321,240 : x
2. Step 2: Convert to fraction form
   6,445,447/9,321,240 = 9,321,240/x
3. Step 3: Cross multiply
   6,445,447x = 9,321,240 × 9,321,240
4. Step 4: Simplify right side
   6,445,447x = 86,885,515,137,600
5. Step 5: Solve for x
   x = 86,885,515,137,600/6,445,447
6. Step 6: Final answer
   x = 13,480,138.02