Finding the Third Proportional to 388,584,540 and 841,739,256

Step by Step Solution

1. Step 1: Write the proportion equation
   388,584,540 : 841,739,256 = 841,739,256 : x
2. Step 2: Convert to fraction form
   388,584,540/841,739,256 = 841,739,256/x
3. Step 3: Cross multiply
   388,584,540x = 841,739,256 × 841,739,256
4. Step 4: Simplify right side
   388,584,540x = 708,524,975,091,433,472
5. Step 5: Solve for x
   x = 708,524,975,091,433,472/388,584,540
6. Step 6: Final answer
   x = 1,823,348,337.77