Finding the Third Proportional to 4,991,654 and 10,219,864

Step by Step Solution

1. Step 1: Write the proportion equation
   4,991,654 : 10,219,864 = 10,219,864 : x
2. Step 2: Convert to fraction form
   4,991,654/10,219,864 = 10,219,864/x
3. Step 3: Cross multiply
   4,991,654x = 10,219,864 × 10,219,864
4. Step 4: Simplify right side
   4,991,654x = 104,445,620,178,496
5. Step 5: Solve for x
   x = 104,445,620,178,496/4,991,654
6. Step 6: Final answer
   x = 20,924,050.46