Finding the Fourth Proportional to 1,601.55, 2,405.94 and 1,054.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,601.55 : 2,405.94 = 1,054.80 : x
2. Step 2: Convert to fraction form
   1,601.55/2,405.94 = 1,054.80/x
3. Step 3: Cross multiply
   1,601.55x = 2,405.94 × 1,054.80
4. Step 4: Simplify right side
   1,601.55x = 2,537,785.51
5. Step 5: Solve for x
   x = 2,537,785.51/1,601.55
6. Step 6: Final answer
   x = 1,584.58