Finding the Third Proportional to 66,987 and 143,185.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,987 : 143,185.50 = 143,185.50 : x
2. Step 2: Convert to fraction form
   66,987/143,185.50 = 143,185.50/x
3. Step 3: Cross multiply
   66,987x = 143,185.50 × 143,185.50
4. Step 4: Simplify right side
   66,987x = 20,502,087,410.25
5. Step 5: Solve for x
   x = 20,502,087,410.25/66,987
6. Step 6: Final answer
   x = 306,060.69