Finding the Third Proportional to 142,956.50 and 210,276.25

Step by Step Solution

1. Step 1: Write the proportion equation
   142,956.50 : 210,276.25 = 210,276.25 : x
2. Step 2: Convert to fraction form
   142,956.50/210,276.25 = 210,276.25/x
3. Step 3: Cross multiply
   142,956.50x = 210,276.25 × 210,276.25
4. Step 4: Simplify right side
   142,956.50x = 44,216,101,314.06
5. Step 5: Solve for x
   x = 44,216,101,314.06/142,956.50
6. Step 6: Final answer
   x = 309,297.59