Finding the Third Proportional to 31,739,128 and 64,370,687

Step by Step Solution

1. Step 1: Write the proportion equation
   31,739,128 : 64,370,687 = 64,370,687 : x
2. Step 2: Convert to fraction form
   31,739,128/64,370,687 = 64,370,687/x
3. Step 3: Cross multiply
   31,739,128x = 64,370,687 × 64,370,687
4. Step 4: Simplify right side
   31,739,128x = 4,143,585,344,851,969
5. Step 5: Solve for x
   x = 4,143,585,344,851,969/31,739,128
6. Step 6: Final answer
   x = 130,551,329.10