Finding the Third Proportional to 131,490 and 288,007.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,490 : 288,007.50 = 288,007.50 : x
2. Step 2: Convert to fraction form
   131,490/288,007.50 = 288,007.50/x
3. Step 3: Cross multiply
   131,490x = 288,007.50 × 288,007.50
4. Step 4: Simplify right side
   131,490x = 82,948,320,056.25
5. Step 5: Solve for x
   x = 82,948,320,056.25/131,490
6. Step 6: Final answer
   x = 630,833.68