Finding the Third Proportional to 143,487 and 210,845.25

Step by Step Solution

1. Step 1: Write the proportion equation
   143,487 : 210,845.25 = 210,845.25 : x
2. Step 2: Convert to fraction form
   143,487/210,845.25 = 210,845.25/x
3. Step 3: Cross multiply
   143,487x = 210,845.25 × 210,845.25
4. Step 4: Simplify right side
   143,487x = 44,455,719,447.56
5. Step 5: Solve for x
   x = 44,455,719,447.56/143,487
6. Step 6: Final answer
   x = 309,824.02