Finding the Third Proportional to 66,367.69 and 143,300.81

Step by Step Solution

1. Step 1: Write the proportion equation
   66,367.69 : 143,300.81 = 143,300.81 : x
2. Step 2: Convert to fraction form
   66,367.69/143,300.81 = 143,300.81/x
3. Step 3: Cross multiply
   66,367.69x = 143,300.81 × 143,300.81
4. Step 4: Simplify right side
   66,367.69x = 20,535,122,863.16
5. Step 5: Solve for x
   x = 20,535,122,863.16/66,367.69
6. Step 6: Final answer
   x = 309,414.47