Finding the Third Proportional to 394,554 and 862,917.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,554 : 862,917.50 = 862,917.50 : x
2. Step 2: Convert to fraction form
   394,554/862,917.50 = 862,917.50/x
3. Step 3: Cross multiply
   394,554x = 862,917.50 × 862,917.50
4. Step 4: Simplify right side
   394,554x = 744,626,611,806.25
5. Step 5: Solve for x
   x = 744,626,611,806.25/394,554
6. Step 6: Final answer
   x = 1,887,261.60