Finding the Third Proportional to 143,521.88 and 213,642.56

Step by Step Solution

1. Step 1: Write the proportion equation
   143,521.88 : 213,642.56 = 213,642.56 : x
2. Step 2: Convert to fraction form
   143,521.88/213,642.56 = 213,642.56/x
3. Step 3: Cross multiply
   143,521.88x = 213,642.56 × 213,642.56
4. Step 4: Simplify right side
   143,521.88x = 45,643,144,511.57
5. Step 5: Solve for x
   x = 45,643,144,511.57/143,521.88
6. Step 6: Final answer
   x = 318,022.21