Finding the Third Proportional to 728,123,420 and 1,604,661,581

Step by Step Solution

1. Step 1: Write the proportion equation
   728,123,420 : 1,604,661,581 = 1,604,661,581 : x
2. Step 2: Convert to fraction form
   728,123,420/1,604,661,581 = 1,604,661,581/x
3. Step 3: Cross multiply
   728,123,420x = 1,604,661,581 × 1,604,661,581
4. Step 4: Simplify right side
   728,123,420x = 2,574,938,789,537,419,776
5. Step 5: Solve for x
   x = 2,574,938,789,537,419,776/728,123,420
6. Step 6: Final answer
   x = 3,536,404,294.67