Finding the Third Proportional to 356,641.50 and 554,006

Step by Step Solution

1. Step 1: Write the proportion equation
   356,641.50 : 554,006 = 554,006 : x
2. Step 2: Convert to fraction form
   356,641.50/554,006 = 554,006/x
3. Step 3: Cross multiply
   356,641.50x = 554,006 × 554,006
4. Step 4: Simplify right side
   356,641.50x = 306,922,648,036
5. Step 5: Solve for x
   x = 306,922,648,036/356,641.50
6. Step 6: Final answer
   x = 860,591.51