Finding the Third Proportional to 136,728 and 287,276.63

Step by Step Solution

1. Step 1: Write the proportion equation
   136,728 : 287,276.63 = 287,276.63 : x
2. Step 2: Convert to fraction form
   136,728/287,276.63 = 287,276.63/x
3. Step 3: Cross multiply
   136,728x = 287,276.63 × 287,276.63
4. Step 4: Simplify right side
   136,728x = 82,527,859,271.39
5. Step 5: Solve for x
   x = 82,527,859,271.39/136,728
6. Step 6: Final answer
   x = 603,591.50