Finding the Third Proportional to 128,583 and 276,300

Step by Step Solution

1. Step 1: Write the proportion equation
   128,583 : 276,300 = 276,300 : x
2. Step 2: Convert to fraction form
   128,583/276,300 = 276,300/x
3. Step 3: Cross multiply
   128,583x = 276,300 × 276,300
4. Step 4: Simplify right side
   128,583x = 76,341,690,000
5. Step 5: Solve for x
   x = 76,341,690,000/128,583
6. Step 6: Final answer
   x = 593,715.27