Finding the Fourth Proportional to 373,071.98, 559,078.04 and 287,358.78

Step by Step Solution

1. Step 1: Write the proportion equation
   373,071.98 : 559,078.04 = 287,358.78 : x
2. Step 2: Convert to fraction form
   373,071.98/559,078.04 = 287,358.78/x
3. Step 3: Cross multiply
   373,071.98x = 559,078.04 × 287,358.78
4. Step 4: Simplify right side
   373,071.98x = 160,655,983,499.19
5. Step 5: Solve for x
   x = 160,655,983,499.19/373,071.98
6. Step 6: Final answer
   x = 430,629.99