Finding the Third Proportional to 148,899.50 and 276,839.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148,899.50 : 276,839.50 = 276,839.50 : x
2. Step 2: Convert to fraction form
   148,899.50/276,839.50 = 276,839.50/x
3. Step 3: Cross multiply
   148,899.50x = 276,839.50 × 276,839.50
4. Step 4: Simplify right side
   148,899.50x = 76,640,108,760.25
5. Step 5: Solve for x
   x = 76,640,108,760.25/148,899.50
6. Step 6: Final answer
   x = 514,710.32