Finding the Third Proportional to 143,899.50 and 308,943

Step by Step Solution

1. Step 1: Write the proportion equation
   143,899.50 : 308,943 = 308,943 : x
2. Step 2: Convert to fraction form
   143,899.50/308,943 = 308,943/x
3. Step 3: Cross multiply
   143,899.50x = 308,943 × 308,943
4. Step 4: Simplify right side
   143,899.50x = 95,445,777,249
5. Step 5: Solve for x
   x = 95,445,777,249/143,899.50
6. Step 6: Final answer
   x = 663,280.81