Finding the Third Proportional to 4,790,509 and 10,208,139

Step by Step Solution

1. Step 1: Write the proportion equation
   4,790,509 : 10,208,139 = 10,208,139 : x
2. Step 2: Convert to fraction form
   4,790,509/10,208,139 = 10,208,139/x
3. Step 3: Cross multiply
   4,790,509x = 10,208,139 × 10,208,139
4. Step 4: Simplify right side
   4,790,509x = 104,206,101,843,321
5. Step 5: Solve for x
   x = 104,206,101,843,321/4,790,509
6. Step 6: Final answer
   x = 21,752,615.82