Finding the Third Proportional to 9,816,700 and 21,090,644

Step by Step Solution

1. Step 1: Write the proportion equation
   9,816,700 : 21,090,644 = 21,090,644 : x
2. Step 2: Convert to fraction form
   9,816,700/21,090,644 = 21,090,644/x
3. Step 3: Cross multiply
   9,816,700x = 21,090,644 × 21,090,644
4. Step 4: Simplify right side
   9,816,700x = 444,815,264,334,736
5. Step 5: Solve for x
   x = 444,815,264,334,736/9,816,700
6. Step 6: Final answer
   x = 45,312,097.17