Finding the Third Proportional to 13,443,678 and 20,663,901

Step by Step Solution

1. Step 1: Write the proportion equation
   13,443,678 : 20,663,901 = 20,663,901 : x
2. Step 2: Convert to fraction form
   13,443,678/20,663,901 = 20,663,901/x
3. Step 3: Cross multiply
   13,443,678x = 20,663,901 × 20,663,901
4. Step 4: Simplify right side
   13,443,678x = 426,996,804,537,801
5. Step 5: Solve for x
   x = 426,996,804,537,801/13,443,678
6. Step 6: Final answer
   x = 31,761,903.59