Finding the Third Proportional to 141,300 and 213,390

Step by Step Solution

1. Step 1: Write the proportion equation
   141,300 : 213,390 = 213,390 : x
2. Step 2: Convert to fraction form
   141,300/213,390 = 213,390/x
3. Step 3: Cross multiply
   141,300x = 213,390 × 213,390
4. Step 4: Simplify right side
   141,300x = 45,535,292,100
5. Step 5: Solve for x
   x = 45,535,292,100/141,300
6. Step 6: Final answer
   x = 322,259.68