Finding the Third Proportional to 398,777.50 and 860,168

Step by Step Solution

1. Step 1: Write the proportion equation
   398,777.50 : 860,168 = 860,168 : x
2. Step 2: Convert to fraction form
   398,777.50/860,168 = 860,168/x
3. Step 3: Cross multiply
   398,777.50x = 860,168 × 860,168
4. Step 4: Simplify right side
   398,777.50x = 739,888,988,224
5. Step 5: Solve for x
   x = 739,888,988,224/398,777.50
6. Step 6: Final answer
   x = 1,855,393.02