Finding the Third Proportional to 8,423,868 and 12,939,984

Step by Step Solution

1. Step 1: Write the proportion equation
   8,423,868 : 12,939,984 = 12,939,984 : x
2. Step 2: Convert to fraction form
   8,423,868/12,939,984 = 12,939,984/x
3. Step 3: Cross multiply
   8,423,868x = 12,939,984 × 12,939,984
4. Step 4: Simplify right side
   8,423,868x = 167,443,185,920,256
5. Step 5: Solve for x
   x = 167,443,185,920,256/8,423,868
6. Step 6: Final answer
   x = 19,877,232.87