Finding the Third Proportional to 143,884.50 and 316,321.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,884.50 : 316,321.50 = 316,321.50 : x
2. Step 2: Convert to fraction form
   143,884.50/316,321.50 = 316,321.50/x
3. Step 3: Cross multiply
   143,884.50x = 316,321.50 × 316,321.50
4. Step 4: Simplify right side
   143,884.50x = 100,059,291,362.25
5. Step 5: Solve for x
   x = 100,059,291,362.25/143,884.50
6. Step 6: Final answer
   x = 695,413.97