Finding the Third Proportional to 287,761 and 672,116.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,761 : 672,116.50 = 672,116.50 : x
2. Step 2: Convert to fraction form
   287,761/672,116.50 = 672,116.50/x
3. Step 3: Cross multiply
   287,761x = 672,116.50 × 672,116.50
4. Step 4: Simplify right side
   287,761x = 451,740,589,572.25
5. Step 5: Solve for x
   x = 451,740,589,572.25/287,761
6. Step 6: Final answer
   x = 1,569,846.47