Finding the Third Proportional to 123,730 and 275,890

Step by Step Solution

1. Step 1: Write the proportion equation
   123,730 : 275,890 = 275,890 : x
2. Step 2: Convert to fraction form
   123,730/275,890 = 275,890/x
3. Step 3: Cross multiply
   123,730x = 275,890 × 275,890
4. Step 4: Simplify right side
   123,730x = 76,115,292,100
5. Step 5: Solve for x
   x = 76,115,292,100/123,730
6. Step 6: Final answer
   x = 615,172.49