Finding the Third Proportional to 138,803 and 301,390

Step by Step Solution

1. Step 1: Write the proportion equation
   138,803 : 301,390 = 301,390 : x
2. Step 2: Convert to fraction form
   138,803/301,390 = 301,390/x
3. Step 3: Cross multiply
   138,803x = 301,390 × 301,390
4. Step 4: Simplify right side
   138,803x = 90,835,932,100
5. Step 5: Solve for x
   x = 90,835,932,100/138,803
6. Step 6: Final answer
   x = 654,423.41