Finding the Third Proportional to 131,818 and 287,693

Step by Step Solution

1. Step 1: Write the proportion equation
   131,818 : 287,693 = 287,693 : x
2. Step 2: Convert to fraction form
   131,818/287,693 = 287,693/x
3. Step 3: Cross multiply
   131,818x = 287,693 × 287,693
4. Step 4: Simplify right side
   131,818x = 82,767,262,249
5. Step 5: Solve for x
   x = 82,767,262,249/131,818
6. Step 6: Final answer
   x = 627,890.44