Finding the Third Proportional to 143,518.50 and 314,397

Step by Step Solution

1. Step 1: Write the proportion equation
   143,518.50 : 314,397 = 314,397 : x
2. Step 2: Convert to fraction form
   143,518.50/314,397 = 314,397/x
3. Step 3: Cross multiply
   143,518.50x = 314,397 × 314,397
4. Step 4: Simplify right side
   143,518.50x = 98,845,473,609
5. Step 5: Solve for x
   x = 98,845,473,609/143,518.50
6. Step 6: Final answer
   x = 688,729.84