Finding the Third Proportional to 8,139,129 and 12,596,955

Step by Step Solution

1. Step 1: Write the proportion equation
   8,139,129 : 12,596,955 = 12,596,955 : x
2. Step 2: Convert to fraction form
   8,139,129/12,596,955 = 12,596,955/x
3. Step 3: Cross multiply
   8,139,129x = 12,596,955 × 12,596,955
4. Step 4: Simplify right side
   8,139,129x = 158,683,275,272,025
5. Step 5: Solve for x
   x = 158,683,275,272,025/8,139,129
6. Step 6: Final answer
   x = 19,496,346.02