Finding the Fourth Proportional to 3,280.58, 4,921.61 and 1,200.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,280.58 : 4,921.61 = 1,200.57 : x
2. Step 2: Convert to fraction form
   3,280.58/4,921.61 = 1,200.57/x
3. Step 3: Cross multiply
   3,280.58x = 4,921.61 × 1,200.57
4. Step 4: Simplify right side
   3,280.58x = 5,908,731.31
5. Step 5: Solve for x
   x = 5,908,731.31/3,280.58
6. Step 6: Final answer
   x = 1,801.13