Finding the Third Proportional to 131,500 and 287,603.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,500 : 287,603.50 = 287,603.50 : x
2. Step 2: Convert to fraction form
   131,500/287,603.50 = 287,603.50/x
3. Step 3: Cross multiply
   131,500x = 287,603.50 × 287,603.50
4. Step 4: Simplify right side
   131,500x = 82,715,773,212.25
5. Step 5: Solve for x
   x = 82,715,773,212.25/131,500
6. Step 6: Final answer
   x = 629,017.29