Finding the Third Proportional to 134,176 and 287,139

Step by Step Solution

1. Step 1: Write the proportion equation
   134,176 : 287,139 = 287,139 : x
2. Step 2: Convert to fraction form
   134,176/287,139 = 287,139/x
3. Step 3: Cross multiply
   134,176x = 287,139 × 287,139
4. Step 4: Simplify right side
   134,176x = 82,448,805,321
5. Step 5: Solve for x
   x = 82,448,805,321/134,176
6. Step 6: Final answer
   x = 614,482.51