Finding the Third Proportional to 721,136 and 1,538,792

Step by Step Solution

1. Step 1: Write the proportion equation
   721,136 : 1,538,792 = 1,538,792 : x
2. Step 2: Convert to fraction form
   721,136/1,538,792 = 1,538,792/x
3. Step 3: Cross multiply
   721,136x = 1,538,792 × 1,538,792
4. Step 4: Simplify right side
   721,136x = 2,367,880,819,264
5. Step 5: Solve for x
   x = 2,367,880,819,264/721,136
6. Step 6: Final answer
   x = 3,283,542.66