Finding the Third Proportional to 5,429,772 and 10,722,488

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429,772 : 10,722,488 = 10,722,488 : x
2. Step 2: Convert to fraction form
   5,429,772/10,722,488 = 10,722,488/x
3. Step 3: Cross multiply
   5,429,772x = 10,722,488 × 10,722,488
4. Step 4: Simplify right side
   5,429,772x = 114,971,748,910,144
5. Step 5: Solve for x
   x = 114,971,748,910,144/5,429,772
6. Step 6: Final answer
   x = 21,174,323.51