Finding the Third Proportional to 288,003 and 435,972

Step by Step Solution

1. Step 1: Write the proportion equation
   288,003 : 435,972 = 435,972 : x
2. Step 2: Convert to fraction form
   288,003/435,972 = 435,972/x
3. Step 3: Cross multiply
   288,003x = 435,972 × 435,972
4. Step 4: Simplify right side
   288,003x = 190,071,584,784
5. Step 5: Solve for x
   x = 190,071,584,784/288,003
6. Step 6: Final answer
   x = 659,963.91