Finding the Third Proportional to 131,470.50 and 287,820

Step by Step Solution

1. Step 1: Write the proportion equation
   131,470.50 : 287,820 = 287,820 : x
2. Step 2: Convert to fraction form
   131,470.50/287,820 = 287,820/x
3. Step 3: Cross multiply
   131,470.50x = 287,820 × 287,820
4. Step 4: Simplify right side
   131,470.50x = 82,840,352,400
5. Step 5: Solve for x
   x = 82,840,352,400/131,470.50
6. Step 6: Final answer
   x = 630,106.01