Finding the Third Proportional to 10,013,139 and 20,557,102.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,013,139 : 20,557,102.50 = 20,557,102.50 : x
2. Step 2: Convert to fraction form
   10,013,139/20,557,102.50 = 20,557,102.50/x
3. Step 3: Cross multiply
   10,013,139x = 20,557,102.50 × 20,557,102.50
4. Step 4: Simplify right side
   10,013,139x = 422,594,463,195,506.25
5. Step 5: Solve for x
   x = 422,594,463,195,506.25/10,013,139
6. Step 6: Final answer
   x = 42,203,994.49