Finding the Third Proportional to 143,382 and 210,132

Step by Step Solution

1. Step 1: Write the proportion equation
   143,382 : 210,132 = 210,132 : x
2. Step 2: Convert to fraction form
   143,382/210,132 = 210,132/x
3. Step 3: Cross multiply
   143,382x = 210,132 × 210,132
4. Step 4: Simplify right side
   143,382x = 44,155,457,424
5. Step 5: Solve for x
   x = 44,155,457,424/143,382
6. Step 6: Final answer
   x = 307,956.77