Finding the Third Proportional to 4,709,390 and 10,171,648

Step by Step Solution

1. Step 1: Write the proportion equation
   4,709,390 : 10,171,648 = 10,171,648 : x
2. Step 2: Convert to fraction form
   4,709,390/10,171,648 = 10,171,648/x
3. Step 3: Cross multiply
   4,709,390x = 10,171,648 × 10,171,648
4. Step 4: Simplify right side
   4,709,390x = 103,462,423,035,904
5. Step 5: Solve for x
   x = 103,462,423,035,904/4,709,390
6. Step 6: Final answer
   x = 21,969,389.46