Finding the Third Proportional to 15,271,738 and 21,362,172

Step by Step Solution

1. Step 1: Write the proportion equation
   15,271,738 : 21,362,172 = 21,362,172 : x
2. Step 2: Convert to fraction form
   15,271,738/21,362,172 = 21,362,172/x
3. Step 3: Cross multiply
   15,271,738x = 21,362,172 × 21,362,172
4. Step 4: Simplify right side
   15,271,738x = 456,342,392,557,584
5. Step 5: Solve for x
   x = 456,342,392,557,584/15,271,738
6. Step 6: Final answer
   x = 29,881,496.96