Finding the Fourth Proportional to 388,500.98, 581,759.76 and 309,730.10

Step by Step Solution

1. Step 1: Write the proportion equation
   388,500.98 : 581,759.76 = 309,730.10 : x
2. Step 2: Convert to fraction form
   388,500.98/581,759.76 = 309,730.10/x
3. Step 3: Cross multiply
   388,500.98x = 581,759.76 × 309,730.10
4. Step 4: Simplify right side
   388,500.98x = 180,188,508,640.78
5. Step 5: Solve for x
   x = 180,188,508,640.78/388,500.98
6. Step 6: Final answer
   x = 463,804.52