Finding the Third Proportional to 131,465 and 287,808

Step by Step Solution

1. Step 1: Write the proportion equation
   131,465 : 287,808 = 287,808 : x
2. Step 2: Convert to fraction form
   131,465/287,808 = 287,808/x
3. Step 3: Cross multiply
   131,465x = 287,808 × 287,808
4. Step 4: Simplify right side
   131,465x = 82,833,444,864
5. Step 5: Solve for x
   x = 82,833,444,864/131,465
6. Step 6: Final answer
   x = 630,079.83