Finding the Third Proportional to 90,563.91 and 196,686.56

Step by Step Solution

1. Step 1: Write the proportion equation
   90,563.91 : 196,686.56 = 196,686.56 : x
2. Step 2: Convert to fraction form
   90,563.91/196,686.56 = 196,686.56/x
3. Step 3: Cross multiply
   90,563.91x = 196,686.56 × 196,686.56
4. Step 4: Simplify right side
   90,563.91x = 38,685,603,868.07
5. Step 5: Solve for x
   x = 38,685,603,868.07/90,563.91
6. Step 6: Final answer
   x = 427,163.60