Finding the Third Proportional to 127,810.50 and 276,780

Step by Step Solution

1. Step 1: Write the proportion equation
   127,810.50 : 276,780 = 276,780 : x
2. Step 2: Convert to fraction form
   127,810.50/276,780 = 276,780/x
3. Step 3: Cross multiply
   127,810.50x = 276,780 × 276,780
4. Step 4: Simplify right side
   127,810.50x = 76,607,168,400
5. Step 5: Solve for x
   x = 76,607,168,400/127,810.50
6. Step 6: Final answer
   x = 599,380.87