Finding the Third Proportional to 394,123.50 and 866,979

Step by Step Solution

1. Step 1: Write the proportion equation
   394,123.50 : 866,979 = 866,979 : x
2. Step 2: Convert to fraction form
   394,123.50/866,979 = 866,979/x
3. Step 3: Cross multiply
   394,123.50x = 866,979 × 866,979
4. Step 4: Simplify right side
   394,123.50x = 751,652,586,441
5. Step 5: Solve for x
   x = 751,652,586,441/394,123.50
6. Step 6: Final answer
   x = 1,907,149.88