Finding the Fourth Proportional to 3,818,105.20, 5,727,028.20 and 978,245.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,818,105.20 : 5,727,028.20 = 978,245.20 : x
2. Step 2: Convert to fraction form
   3,818,105.20/5,727,028.20 = 978,245.20/x
3. Step 3: Cross multiply
   3,818,105.20x = 5,727,028.20 × 978,245.20
4. Step 4: Simplify right side
   3,818,105.20x = 5,602,437,846,914.64
5. Step 5: Solve for x
   x = 5,602,437,846,914.64/3,818,105.20
6. Step 6: Final answer
   x = 1,467,334.59