Finding the Third Proportional to 143,948.81 and 309,767.63

Step by Step Solution

1. Step 1: Write the proportion equation
   143,948.81 : 309,767.63 = 309,767.63 : x
2. Step 2: Convert to fraction form
   143,948.81/309,767.63 = 309,767.63/x
3. Step 3: Cross multiply
   143,948.81x = 309,767.63 × 309,767.63
4. Step 4: Simplify right side
   143,948.81x = 95,955,981,498.14
5. Step 5: Solve for x
   x = 95,955,981,498.14/143,948.81
6. Step 6: Final answer
   x = 666,597.94