Finding the Third Proportional to 386,722 and 830,569.50

Step by Step Solution

1. Step 1: Write the proportion equation
   386,722 : 830,569.50 = 830,569.50 : x
2. Step 2: Convert to fraction form
   386,722/830,569.50 = 830,569.50/x
3. Step 3: Cross multiply
   386,722x = 830,569.50 × 830,569.50
4. Step 4: Simplify right side
   386,722x = 689,845,694,330.25
5. Step 5: Solve for x
   x = 689,845,694,330.25/386,722
6. Step 6: Final answer
   x = 1,783,828.42