Finding the Third Proportional to 389,404.50 and 845,239

Step by Step Solution

1. Step 1: Write the proportion equation
   389,404.50 : 845,239 = 845,239 : x
2. Step 2: Convert to fraction form
   389,404.50/845,239 = 845,239/x
3. Step 3: Cross multiply
   389,404.50x = 845,239 × 845,239
4. Step 4: Simplify right side
   389,404.50x = 714,428,967,121
5. Step 5: Solve for x
   x = 714,428,967,121/389,404.50
6. Step 6: Final answer
   x = 1,834,670.55