Finding the Third Proportional to 388,499.25 and 843,439.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,499.25 : 843,439.50 = 843,439.50 : x
2. Step 2: Convert to fraction form
   388,499.25/843,439.50 = 843,439.50/x
3. Step 3: Cross multiply
   388,499.25x = 843,439.50 × 843,439.50
4. Step 4: Simplify right side
   388,499.25x = 711,390,190,160.25
5. Step 5: Solve for x
   x = 711,390,190,160.25/388,499.25
6. Step 6: Final answer
   x = 1,831,123.72