Finding the Third Proportional to 185,122.50 and 399,036

Step by Step Solution

1. Step 1: Write the proportion equation
   185,122.50 : 399,036 = 399,036 : x
2. Step 2: Convert to fraction form
   185,122.50/399,036 = 399,036/x
3. Step 3: Cross multiply
   185,122.50x = 399,036 × 399,036
4. Step 4: Simplify right side
   185,122.50x = 159,229,729,296
5. Step 5: Solve for x
   x = 159,229,729,296/185,122.50
6. Step 6: Final answer
   x = 860,131.69