Finding the Third Proportional to 5,429,912 and 10,722,760

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429,912 : 10,722,760 = 10,722,760 : x
2. Step 2: Convert to fraction form
   5,429,912/10,722,760 = 10,722,760/x
3. Step 3: Cross multiply
   5,429,912x = 10,722,760 × 10,722,760
4. Step 4: Simplify right side
   5,429,912x = 114,977,582,017,600
5. Step 5: Solve for x
   x = 114,977,582,017,600/5,429,912
6. Step 6: Final answer
   x = 21,174,851.82