Finding the Third Proportional to 134,172 and 287,131

Step by Step Solution

1. Step 1: Write the proportion equation
   134,172 : 287,131 = 287,131 : x
2. Step 2: Convert to fraction form
   134,172/287,131 = 287,131/x
3. Step 3: Cross multiply
   134,172x = 287,131 × 287,131
4. Step 4: Simplify right side
   134,172x = 82,444,211,161
5. Step 5: Solve for x
   x = 82,444,211,161/134,172
6. Step 6: Final answer
   x = 614,466.59