Finding the Third Proportional to 90,240 and 196,404

Step by Step Solution

1. Step 1: Write the proportion equation
   90,240 : 196,404 = 196,404 : x
2. Step 2: Convert to fraction form
   90,240/196,404 = 196,404/x
3. Step 3: Cross multiply
   90,240x = 196,404 × 196,404
4. Step 4: Simplify right side
   90,240x = 38,574,531,216
5. Step 5: Solve for x
   x = 38,574,531,216/90,240
6. Step 6: Final answer
   x = 427,465.99