Finding the Third Proportional to 143,653.50 and 215,677.69

Step by Step Solution

1. Step 1: Write the proportion equation
   143,653.50 : 215,677.69 = 215,677.69 : x
2. Step 2: Convert to fraction form
   143,653.50/215,677.69 = 215,677.69/x
3. Step 3: Cross multiply
   143,653.50x = 215,677.69 × 215,677.69
4. Step 4: Simplify right side
   143,653.50x = 46,516,864,885.35
5. Step 5: Solve for x
   x = 46,516,864,885.35/143,653.50
6. Step 6: Final answer
   x = 323,812.96