Finding the Third Proportional to 393,886.50 and 859,063

Step by Step Solution

1. Step 1: Write the proportion equation
   393,886.50 : 859,063 = 859,063 : x
2. Step 2: Convert to fraction form
   393,886.50/859,063 = 859,063/x
3. Step 3: Cross multiply
   393,886.50x = 859,063 × 859,063
4. Step 4: Simplify right side
   393,886.50x = 737,989,237,969
5. Step 5: Solve for x
   x = 737,989,237,969/393,886.50
6. Step 6: Final answer
   x = 1,873,608.86