Finding the Fourth Proportional to 446,185.69, 615,141.55 and 354,610.76

Step by Step Solution

1. Step 1: Write the proportion equation
   446,185.69 : 615,141.55 = 354,610.76 : x
2. Step 2: Convert to fraction form
   446,185.69/615,141.55 = 354,610.76/x
3. Step 3: Cross multiply
   446,185.69x = 615,141.55 × 354,610.76
4. Step 4: Simplify right side
   446,185.69x = 218,135,812,005.78
5. Step 5: Solve for x
   x = 218,135,812,005.78/446,185.69
6. Step 6: Final answer
   x = 488,890.20