Finding the Third Proportional to 143,118 and 210,298

Step by Step Solution

1. Step 1: Write the proportion equation
   143,118 : 210,298 = 210,298 : x
2. Step 2: Convert to fraction form
   143,118/210,298 = 210,298/x
3. Step 3: Cross multiply
   143,118x = 210,298 × 210,298
4. Step 4: Simplify right side
   143,118x = 44,225,248,804
5. Step 5: Solve for x
   x = 44,225,248,804/143,118
6. Step 6: Final answer
   x = 309,012.48