Finding the Third Proportional to 162,216 and 216,987.75

Step by Step Solution

1. Step 1: Write the proportion equation
   162,216 : 216,987.75 = 216,987.75 : x
2. Step 2: Convert to fraction form
   162,216/216,987.75 = 216,987.75/x
3. Step 3: Cross multiply
   162,216x = 216,987.75 × 216,987.75
4. Step 4: Simplify right side
   162,216x = 47,083,683,650.06
5. Step 5: Solve for x
   x = 47,083,683,650.06/162,216
6. Step 6: Final answer
   x = 290,253.02