Finding the Third Proportional to 143,059.50 and 216,432

Step by Step Solution

1. Step 1: Write the proportion equation
   143,059.50 : 216,432 = 216,432 : x
2. Step 2: Convert to fraction form
   143,059.50/216,432 = 216,432/x
3. Step 3: Cross multiply
   143,059.50x = 216,432 × 216,432
4. Step 4: Simplify right side
   143,059.50x = 46,842,810,624
5. Step 5: Solve for x
   x = 46,842,810,624/143,059.50
6. Step 6: Final answer
   x = 327,435.86