Finding the Third Proportional to 8,503,172 and 12,912,222

Step by Step Solution

1. Step 1: Write the proportion equation
   8,503,172 : 12,912,222 = 12,912,222 : x
2. Step 2: Convert to fraction form
   8,503,172/12,912,222 = 12,912,222/x
3. Step 3: Cross multiply
   8,503,172x = 12,912,222 × 12,912,222
4. Step 4: Simplify right side
   8,503,172x = 166,725,476,977,284
5. Step 5: Solve for x
   x = 166,725,476,977,284/8,503,172
6. Step 6: Final answer
   x = 19,607,444.96