Finding the Third Proportional to 9,988,586 and 21,493,123

Step by Step Solution

1. Step 1: Write the proportion equation
   9,988,586 : 21,493,123 = 21,493,123 : x
2. Step 2: Convert to fraction form
   9,988,586/21,493,123 = 21,493,123/x
3. Step 3: Cross multiply
   9,988,586x = 21,493,123 × 21,493,123
4. Step 4: Simplify right side
   9,988,586x = 461,954,336,293,129
5. Step 5: Solve for x
   x = 461,954,336,293,129/9,988,586
6. Step 6: Final answer
   x = 46,248,221.35