Finding the Third Proportional to 9,857,218 and 21,572,630

Step by Step Solution

1. Step 1: Write the proportion equation
   9,857,218 : 21,572,630 = 21,572,630 : x
2. Step 2: Convert to fraction form
   9,857,218/21,572,630 = 21,572,630/x
3. Step 3: Cross multiply
   9,857,218x = 21,572,630 × 21,572,630
4. Step 4: Simplify right side
   9,857,218x = 465,378,365,116,900
5. Step 5: Solve for x
   x = 465,378,365,116,900/9,857,218
6. Step 6: Final answer
   x = 47,211,938.00