Finding the Third Proportional to 398,308.50 and 860,004

Step by Step Solution

1. Step 1: Write the proportion equation
   398,308.50 : 860,004 = 860,004 : x
2. Step 2: Convert to fraction form
   398,308.50/860,004 = 860,004/x
3. Step 3: Cross multiply
   398,308.50x = 860,004 × 860,004
4. Step 4: Simplify right side
   398,308.50x = 739,606,880,016
5. Step 5: Solve for x
   x = 739,606,880,016/398,308.50
6. Step 6: Final answer
   x = 1,856,869.44