Finding the Third Proportional to 143,111.81 and 307,956.94

Step by Step Solution

1. Step 1: Write the proportion equation
   143,111.81 : 307,956.94 = 307,956.94 : x
2. Step 2: Convert to fraction form
   143,111.81/307,956.94 = 307,956.94/x
3. Step 3: Cross multiply
   143,111.81x = 307,956.94 × 307,956.94
4. Step 4: Simplify right side
   143,111.81x = 94,837,475,354.38
5. Step 5: Solve for x
   x = 94,837,475,354.38/143,111.81
6. Step 6: Final answer
   x = 662,680.97