Finding the Third Proportional to 136,680 and 287,182

Step by Step Solution

1. Step 1: Write the proportion equation
   136,680 : 287,182 = 287,182 : x
2. Step 2: Convert to fraction form
   136,680/287,182 = 287,182/x
3. Step 3: Cross multiply
   136,680x = 287,182 × 287,182
4. Step 4: Simplify right side
   136,680x = 82,473,501,124
5. Step 5: Solve for x
   x = 82,473,501,124/136,680
6. Step 6: Final answer
   x = 603,405.77