Finding the Third Proportional to 388,419,120 and 832,240,890

Step by Step Solution

1. Step 1: Write the proportion equation
   388,419,120 : 832,240,890 = 832,240,890 : x
2. Step 2: Convert to fraction form
   388,419,120/832,240,890 = 832,240,890/x
3. Step 3: Cross multiply
   388,419,120x = 832,240,890 × 832,240,890
4. Step 4: Simplify right side
   388,419,120x = 692,624,898,987,992,064
5. Step 5: Solve for x
   x = 692,624,898,987,992,064/388,419,120
6. Step 6: Final answer
   x = 1,783,189,506.71