Finding the Third Proportional to 127,890 and 200,621.25

Step by Step Solution

1. Step 1: Write the proportion equation
   127,890 : 200,621.25 = 200,621.25 : x
2. Step 2: Convert to fraction form
   127,890/200,621.25 = 200,621.25/x
3. Step 3: Cross multiply
   127,890x = 200,621.25 × 200,621.25
4. Step 4: Simplify right side
   127,890x = 40,248,885,951.56
5. Step 5: Solve for x
   x = 40,248,885,951.56/127,890
6. Step 6: Final answer
   x = 314,714.88