Finding the Third Proportional to 143,160 and 314,640

Step by Step Solution

1. Step 1: Write the proportion equation
   143,160 : 314,640 = 314,640 : x
2. Step 2: Convert to fraction form
   143,160/314,640 = 314,640/x
3. Step 3: Cross multiply
   143,160x = 314,640 × 314,640
4. Step 4: Simplify right side
   143,160x = 98,998,329,600
5. Step 5: Solve for x
   x = 98,998,329,600/143,160
6. Step 6: Final answer
   x = 691,522.28