Finding the Fourth Proportional to 678,671.69, 1,018,132.61 and 223,288.52

Step by Step Solution

1. Step 1: Write the proportion equation
   678,671.69 : 1,018,132.61 = 223,288.52 : x
2. Step 2: Convert to fraction form
   678,671.69/1,018,132.61 = 223,288.52/x
3. Step 3: Cross multiply
   678,671.69x = 1,018,132.61 × 223,288.52
4. Step 4: Simplify right side
   678,671.69x = 227,337,317,443.53
5. Step 5: Solve for x
   x = 227,337,317,443.53/678,671.69
6. Step 6: Final answer
   x = 334,973.92