Finding the Third Proportional to 162,216 and 216,985.50

Step by Step Solution

1. Step 1: Write the proportion equation
   162,216 : 216,985.50 = 216,985.50 : x
2. Step 2: Convert to fraction form
   162,216/216,985.50 = 216,985.50/x
3. Step 3: Cross multiply
   162,216x = 216,985.50 × 216,985.50
4. Step 4: Simplify right side
   162,216x = 47,082,707,210.25
5. Step 5: Solve for x
   x = 47,082,707,210.25/162,216
6. Step 6: Final answer
   x = 290,247.00