Finding the Third Proportional to 131,117 and 287,506

Step by Step Solution

1. Step 1: Write the proportion equation
   131,117 : 287,506 = 287,506 : x
2. Step 2: Convert to fraction form
   131,117/287,506 = 287,506/x
3. Step 3: Cross multiply
   131,117x = 287,506 × 287,506
4. Step 4: Simplify right side
   131,117x = 82,659,700,036
5. Step 5: Solve for x
   x = 82,659,700,036/131,117
6. Step 6: Final answer
   x = 630,427.02