Finding the Third Proportional to 387,483 and 821,059.50

Step by Step Solution

1. Step 1: Write the proportion equation
   387,483 : 821,059.50 = 821,059.50 : x
2. Step 2: Convert to fraction form
   387,483/821,059.50 = 821,059.50/x
3. Step 3: Cross multiply
   387,483x = 821,059.50 × 821,059.50
4. Step 4: Simplify right side
   387,483x = 674,138,702,540.25
5. Step 5: Solve for x
   x = 674,138,702,540.25/387,483
6. Step 6: Final answer
   x = 1,739,789.11