Finding the Third Proportional to 5,429,970 and 10,722,888

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429,970 : 10,722,888 = 10,722,888 : x
2. Step 2: Convert to fraction form
   5,429,970/10,722,888 = 10,722,888/x
3. Step 3: Cross multiply
   5,429,970x = 10,722,888 × 10,722,888
4. Step 4: Simplify right side
   5,429,970x = 114,980,327,060,544
5. Step 5: Solve for x
   x = 114,980,327,060,544/5,429,970
6. Step 6: Final answer
   x = 21,175,131.18