Finding the Third Proportional to 143,520.50 and 314,311

Step by Step Solution

1. Step 1: Write the proportion equation
   143,520.50 : 314,311 = 314,311 : x
2. Step 2: Convert to fraction form
   143,520.50/314,311 = 314,311/x
3. Step 3: Cross multiply
   143,520.50x = 314,311 × 314,311
4. Step 4: Simplify right side
   143,520.50x = 98,791,404,721
5. Step 5: Solve for x
   x = 98,791,404,721/143,520.50
6. Step 6: Final answer
   x = 688,343.51