Finding the Fourth Proportional to 3,217,134.18, 4,825,698.15 and 820,978.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,217,134.18 : 4,825,698.15 = 820,978.83 : x
2. Step 2: Convert to fraction form
   3,217,134.18/4,825,698.15 = 820,978.83/x
3. Step 3: Cross multiply
   3,217,134.18x = 4,825,698.15 × 820,978.83
4. Step 4: Simplify right side
   3,217,134.18x = 3,961,796,021,120.16
5. Step 5: Solve for x
   x = 3,961,796,021,120.16/3,217,134.18
6. Step 6: Final answer
   x = 1,231,467.45