Finding the Fourth Proportional to 1,800.86, 2,485.80 and 1,055.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,800.86 : 2,485.80 = 1,055.06 : x
2. Step 2: Convert to fraction form
   1,800.86/2,485.80 = 1,055.06/x
3. Step 3: Cross multiply
   1,800.86x = 2,485.80 × 1,055.06
4. Step 4: Simplify right side
   1,800.86x = 2,622,655.72
5. Step 5: Solve for x
   x = 2,622,655.72/1,800.86
6. Step 6: Final answer
   x = 1,456.34