Finding the Third Proportional to 143,584 and 316,111

Step by Step Solution

1. Step 1: Write the proportion equation
   143,584 : 316,111 = 316,111 : x
2. Step 2: Convert to fraction form
   143,584/316,111 = 316,111/x
3. Step 3: Cross multiply
   143,584x = 316,111 × 316,111
4. Step 4: Simplify right side
   143,584x = 99,926,164,321
5. Step 5: Solve for x
   x = 99,926,164,321/143,584
6. Step 6: Final answer
   x = 695,942.20