Finding the Third Proportional to 200,560 and 427,160

Step by Step Solution

1. Step 1: Write the proportion equation
   200,560 : 427,160 = 427,160 : x
2. Step 2: Convert to fraction form
   200,560/427,160 = 427,160/x
3. Step 3: Cross multiply
   200,560x = 427,160 × 427,160
4. Step 4: Simplify right side
   200,560x = 182,465,665,600
5. Step 5: Solve for x
   x = 182,465,665,600/200,560
6. Step 6: Final answer
   x = 909,780.94