Finding the Third Proportional to 91,128.13 and 196,225.88

Step by Step Solution

1. Step 1: Write the proportion equation
   91,128.13 : 196,225.88 = 196,225.88 : x
2. Step 2: Convert to fraction form
   91,128.13/196,225.88 = 196,225.88/x
3. Step 3: Cross multiply
   91,128.13x = 196,225.88 × 196,225.88
4. Step 4: Simplify right side
   91,128.13x = 38,504,594,019.52
5. Step 5: Solve for x
   x = 38,504,594,019.52/91,128.13
6. Step 6: Final answer
   x = 422,532.49