Finding the Third Proportional to 65,630.50 and 143,140

Step by Step Solution

1. Step 1: Write the proportion equation
   65,630.50 : 143,140 = 143,140 : x
2. Step 2: Convert to fraction form
   65,630.50/143,140 = 143,140/x
3. Step 3: Cross multiply
   65,630.50x = 143,140 × 143,140
4. Step 4: Simplify right side
   65,630.50x = 20,489,059,600
5. Step 5: Solve for x
   x = 20,489,059,600/65,630.50
6. Step 6: Final answer
   x = 312,188.08