Finding the Third Proportional to 394,538 and 862,903.75

Step by Step Solution

1. Step 1: Write the proportion equation
   394,538 : 862,903.75 = 862,903.75 : x
2. Step 2: Convert to fraction form
   394,538/862,903.75 = 862,903.75/x
3. Step 3: Cross multiply
   394,538x = 862,903.75 × 862,903.75
4. Step 4: Simplify right side
   394,538x = 744,602,881,764.06
5. Step 5: Solve for x
   x = 744,602,881,764.06/394,538
6. Step 6: Final answer
   x = 1,887,277.99