Finding the Third Proportional to 394,141.50 and 861,907.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,141.50 : 861,907.50 = 861,907.50 : x
2. Step 2: Convert to fraction form
   394,141.50/861,907.50 = 861,907.50/x
3. Step 3: Cross multiply
   394,141.50x = 861,907.50 × 861,907.50
4. Step 4: Simplify right side
   394,141.50x = 742,884,538,556.25
5. Step 5: Solve for x
   x = 742,884,538,556.25/394,141.50
6. Step 6: Final answer
   x = 1,884,816.85