Finding the Third Proportional to 91,412 and 200,312

Step by Step Solution

1. Step 1: Write the proportion equation
   91,412 : 200,312 = 200,312 : x
2. Step 2: Convert to fraction form
   91,412/200,312 = 200,312/x
3. Step 3: Cross multiply
   91,412x = 200,312 × 200,312
4. Step 4: Simplify right side
   91,412x = 40,124,897,344
5. Step 5: Solve for x
   x = 40,124,897,344/91,412
6. Step 6: Final answer
   x = 438,945.62