Finding the Third Proportional to 285,948 and 618,970.50

Step by Step Solution

1. Step 1: Write the proportion equation
   285,948 : 618,970.50 = 618,970.50 : x
2. Step 2: Convert to fraction form
   285,948/618,970.50 = 618,970.50/x
3. Step 3: Cross multiply
   285,948x = 618,970.50 × 618,970.50
4. Step 4: Simplify right side
   285,948x = 383,124,479,870.25
5. Step 5: Solve for x
   x = 383,124,479,870.25/285,948
6. Step 6: Final answer
   x = 1,339,839.69