Finding the Third Proportional to 9,905,858 and 21,570,297

Step by Step Solution

1. Step 1: Write the proportion equation
   9,905,858 : 21,570,297 = 21,570,297 : x
2. Step 2: Convert to fraction form
   9,905,858/21,570,297 = 21,570,297/x
3. Step 3: Cross multiply
   9,905,858x = 21,570,297 × 21,570,297
4. Step 4: Simplify right side
   9,905,858x = 465,277,712,668,209
5. Step 5: Solve for x
   x = 465,277,712,668,209/9,905,858
6. Step 6: Final answer
   x = 46,969,955.82