Finding the Third Proportional to 185,715 and 400,986

Step by Step Solution

1. Step 1: Write the proportion equation
   185,715 : 400,986 = 400,986 : x
2. Step 2: Convert to fraction form
   185,715/400,986 = 400,986/x
3. Step 3: Cross multiply
   185,715x = 400,986 × 400,986
4. Step 4: Simplify right side
   185,715x = 160,789,772,196
5. Step 5: Solve for x
   x = 160,789,772,196/185,715
6. Step 6: Final answer
   x = 865,787.75