Finding the Third Proportional to 721,136.50 and 1,538,793.50

Step by Step Solution

1. Step 1: Write the proportion equation
   721,136.50 : 1,538,793.50 = 1,538,793.50 : x
2. Step 2: Convert to fraction form
   721,136.50/1,538,793.50 = 1,538,793.50/x
3. Step 3: Cross multiply
   721,136.50x = 1,538,793.50 × 1,538,793.50
4. Step 4: Simplify right side
   721,136.50x = 2,367,885,435,642.25
5. Step 5: Solve for x
   x = 2,367,885,435,642.25/721,136.50
6. Step 6: Final answer
   x = 3,283,546.78