Finding the Fourth Proportional to 3,111.03, 4,667.55 and 1,261.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.03 : 4,667.55 = 1,261.20 : x
2. Step 2: Convert to fraction form
   3,111.03/4,667.55 = 1,261.20/x
3. Step 3: Cross multiply
   3,111.03x = 4,667.55 × 1,261.20
4. Step 4: Simplify right side
   3,111.03x = 5,886,714.06
5. Step 5: Solve for x
   x = 5,886,714.06/3,111.03
6. Step 6: Final answer
   x = 1,892.21