Finding the Third Proportional to 143,086.50 and 310,776

Step by Step Solution

1. Step 1: Write the proportion equation
   143,086.50 : 310,776 = 310,776 : x
2. Step 2: Convert to fraction form
   143,086.50/310,776 = 310,776/x
3. Step 3: Cross multiply
   143,086.50x = 310,776 × 310,776
4. Step 4: Simplify right side
   143,086.50x = 96,581,722,176
5. Step 5: Solve for x
   x = 96,581,722,176/143,086.50
6. Step 6: Final answer
   x = 674,988.36