Finding the Third Proportional to 143,136 and 314,581.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,136 : 314,581.50 = 314,581.50 : x
2. Step 2: Convert to fraction form
   143,136/314,581.50 = 314,581.50/x
3. Step 3: Cross multiply
   143,136x = 314,581.50 × 314,581.50
4. Step 4: Simplify right side
   143,136x = 98,961,520,142.25
5. Step 5: Solve for x
   x = 98,961,520,142.25/143,136
6. Step 6: Final answer
   x = 691,381.07