Finding the Third Proportional to 91,118 and 200,172

Step by Step Solution

1. Step 1: Write the proportion equation
   91,118 : 200,172 = 200,172 : x
2. Step 2: Convert to fraction form
   91,118/200,172 = 200,172/x
3. Step 3: Cross multiply
   91,118x = 200,172 × 200,172
4. Step 4: Simplify right side
   91,118x = 40,068,829,584
5. Step 5: Solve for x
   x = 40,068,829,584/91,118
6. Step 6: Final answer
   x = 439,746.59