Finding the Third Proportional to 20,902,424 and 42,644,664

Step by Step Solution

1. Step 1: Write the proportion equation
   20,902,424 : 42,644,664 = 42,644,664 : x
2. Step 2: Convert to fraction form
   20,902,424/42,644,664 = 42,644,664/x
3. Step 3: Cross multiply
   20,902,424x = 42,644,664 × 42,644,664
4. Step 4: Simplify right side
   20,902,424x = 1,818,567,367,672,896
5. Step 5: Solve for x
   x = 1,818,567,367,672,896/20,902,424
6. Step 6: Final answer
   x = 87,002,702.06