Finding the Fourth Proportional to 680,892, 939,660.12 and 379,086

Step by Step Solution

1. Step 1: Write the proportion equation
   680,892 : 939,660.12 = 379,086 : x
2. Step 2: Convert to fraction form
   680,892/939,660.12 = 379,086/x
3. Step 3: Cross multiply
   680,892x = 939,660.12 × 379,086
4. Step 4: Simplify right side
   680,892x = 356,211,996,250.32
5. Step 5: Solve for x
   x = 356,211,996,250.32/680,892
6. Step 6: Final answer
   x = 523,154.91