Finding the Third Proportional to 216,890 and 469,984

Step by Step Solution

1. Step 1: Write the proportion equation
   216,890 : 469,984 = 469,984 : x
2. Step 2: Convert to fraction form
   216,890/469,984 = 469,984/x
3. Step 3: Cross multiply
   216,890x = 469,984 × 469,984
4. Step 4: Simplify right side
   216,890x = 220,884,960,256
5. Step 5: Solve for x
   x = 220,884,960,256/216,890
6. Step 6: Final answer
   x = 1,018,419.29