Finding the Third Proportional to 143,076 and 314,172

Step by Step Solution

1. Step 1: Write the proportion equation
   143,076 : 314,172 = 314,172 : x
2. Step 2: Convert to fraction form
   143,076/314,172 = 314,172/x
3. Step 3: Cross multiply
   143,076x = 314,172 × 314,172
4. Step 4: Simplify right side
   143,076x = 98,704,045,584
5. Step 5: Solve for x
   x = 98,704,045,584/143,076
6. Step 6: Final answer
   x = 689,871.44