Finding the Third Proportional to 385,680 and 843,648

Step by Step Solution

1. Step 1: Write the proportion equation
   385,680 : 843,648 = 843,648 : x
2. Step 2: Convert to fraction form
   385,680/843,648 = 843,648/x
3. Step 3: Cross multiply
   385,680x = 843,648 × 843,648
4. Step 4: Simplify right side
   385,680x = 711,741,947,904
5. Step 5: Solve for x
   x = 711,741,947,904/385,680
6. Step 6: Final answer
   x = 1,845,420.94