Finding the Fourth Proportional to 585,065.45, 807,149.89 and 355,585.76

Step by Step Solution

1. Step 1: Write the proportion equation
   585,065.45 : 807,149.89 = 355,585.76 : x
2. Step 2: Convert to fraction form
   585,065.45/807,149.89 = 355,585.76/x
3. Step 3: Cross multiply
   585,065.45x = 807,149.89 × 355,585.76
4. Step 4: Simplify right side
   585,065.45x = 287,011,011,045.33
5. Step 5: Solve for x
   x = 287,011,011,045.33/585,065.45
6. Step 6: Final answer
   x = 490,562.23