Finding the Third Proportional to 131,520 and 287,647.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,520 : 287,647.50 = 287,647.50 : x
2. Step 2: Convert to fraction form
   131,520/287,647.50 = 287,647.50/x
3. Step 3: Cross multiply
   131,520x = 287,647.50 × 287,647.50
4. Step 4: Simplify right side
   131,520x = 82,741,084,256.25
5. Step 5: Solve for x
   x = 82,741,084,256.25/131,520
6. Step 6: Final answer
   x = 629,114.08