Finding the Third Proportional to 386,724 and 830,573.50

Step by Step Solution

1. Step 1: Write the proportion equation
   386,724 : 830,573.50 = 830,573.50 : x
2. Step 2: Convert to fraction form
   386,724/830,573.50 = 830,573.50/x
3. Step 3: Cross multiply
   386,724x = 830,573.50 × 830,573.50
4. Step 4: Simplify right side
   386,724x = 689,852,338,902.25
5. Step 5: Solve for x
   x = 689,852,338,902.25/386,724
6. Step 6: Final answer
   x = 1,783,836.38