Finding the Third Proportional to 196,216 and 423,792

Step by Step Solution

1. Step 1: Write the proportion equation
   196,216 : 423,792 = 423,792 : x
2. Step 2: Convert to fraction form
   196,216/423,792 = 423,792/x
3. Step 3: Cross multiply
   196,216x = 423,792 × 423,792
4. Step 4: Simplify right side
   196,216x = 179,599,659,264
5. Step 5: Solve for x
   x = 179,599,659,264/196,216
6. Step 6: Final answer
   x = 915,316.08