Finding the Third Proportional to 132,726 and 287,590

Step by Step Solution

1. Step 1: Write the proportion equation
   132,726 : 287,590 = 287,590 : x
2. Step 2: Convert to fraction form
   132,726/287,590 = 287,590/x
3. Step 3: Cross multiply
   132,726x = 287,590 × 287,590
4. Step 4: Simplify right side
   132,726x = 82,708,008,100
5. Step 5: Solve for x
   x = 82,708,008,100/132,726
6. Step 6: Final answer
   x = 623,148.50