Finding the Fourth Proportional to 559,020.72, 771,557.82 and 355,308.96

Step by Step Solution

1. Step 1: Write the proportion equation
   559,020.72 : 771,557.82 = 355,308.96 : x
2. Step 2: Convert to fraction form
   559,020.72/771,557.82 = 355,308.96/x
3. Step 3: Cross multiply
   559,020.72x = 771,557.82 × 355,308.96
4. Step 4: Simplify right side
   559,020.72x = 274,141,406,604.07
5. Step 5: Solve for x
   x = 274,141,406,604.07/559,020.72
6. Step 6: Final answer
   x = 490,395.79