Finding the Third Proportional to 399,392.50 and 854,945

Step by Step Solution

1. Step 1: Write the proportion equation
   399,392.50 : 854,945 = 854,945 : x
2. Step 2: Convert to fraction form
   399,392.50/854,945 = 854,945/x
3. Step 3: Cross multiply
   399,392.50x = 854,945 × 854,945
4. Step 4: Simplify right side
   399,392.50x = 730,930,953,025
5. Step 5: Solve for x
   x = 730,930,953,025/399,392.50
6. Step 6: Final answer
   x = 1,830,106.86