Finding the Third Proportional to 136,432 and 287,003

Step by Step Solution

1. Step 1: Write the proportion equation
   136,432 : 287,003 = 287,003 : x
2. Step 2: Convert to fraction form
   136,432/287,003 = 287,003/x
3. Step 3: Cross multiply
   136,432x = 287,003 × 287,003
4. Step 4: Simplify right side
   136,432x = 82,370,722,009
5. Step 5: Solve for x
   x = 82,370,722,009/136,432
6. Step 6: Final answer
   x = 603,749.28