Finding the Fourth Proportional to 2,050.78, 3,075.87 and 664.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,050.78 : 3,075.87 = 664.16 : x
2. Step 2: Convert to fraction form
   2,050.78/3,075.87 = 664.16/x
3. Step 3: Cross multiply
   2,050.78x = 3,075.87 × 664.16
4. Step 4: Simplify right side
   2,050.78x = 2,042,866.50
5. Step 5: Solve for x
   x = 2,042,866.50/2,050.78
6. Step 6: Final answer
   x = 996.14