Finding the Third Proportional to 142,616.32 and 213,480.25

Step by Step Solution

1. Step 1: Write the proportion equation
   142,616.32 : 213,480.25 = 213,480.25 : x
2. Step 2: Convert to fraction form
   142,616.32/213,480.25 = 213,480.25/x
3. Step 3: Cross multiply
   142,616.32x = 213,480.25 × 213,480.25
4. Step 4: Simplify right side
   142,616.32x = 45,573,815,472.25
5. Step 5: Solve for x
   x = 45,573,815,472.25/142,616.32
6. Step 6: Final answer
   x = 319,555.40