Finding the Third Proportional to 61,407 and 143,172

Step by Step Solution

1. Step 1: Write the proportion equation
   61,407 : 143,172 = 143,172 : x
2. Step 2: Convert to fraction form
   61,407/143,172 = 143,172/x
3. Step 3: Cross multiply
   61,407x = 143,172 × 143,172
4. Step 4: Simplify right side
   61,407x = 20,498,221,584
5. Step 5: Solve for x
   x = 20,498,221,584/61,407
6. Step 6: Final answer
   x = 333,809.20