Finding the Third Proportional to 155,500.50 and 287,640

Step by Step Solution

1. Step 1: Write the proportion equation
   155,500.50 : 287,640 = 287,640 : x
2. Step 2: Convert to fraction form
   155,500.50/287,640 = 287,640/x
3. Step 3: Cross multiply
   155,500.50x = 287,640 × 287,640
4. Step 4: Simplify right side
   155,500.50x = 82,736,769,600
5. Step 5: Solve for x
   x = 82,736,769,600/155,500.50
6. Step 6: Final answer
   x = 532,067.55