Finding the Fourth Proportional to 2,231.09, 3,078.98 and 1,346.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.09 : 3,078.98 = 1,346.72 : x
2. Step 2: Convert to fraction form
   2,231.09/3,078.98 = 1,346.72/x
3. Step 3: Cross multiply
   2,231.09x = 3,078.98 × 1,346.72
4. Step 4: Simplify right side
   2,231.09x = 4,146,501.82
5. Step 5: Solve for x
   x = 4,146,501.82/2,231.09
6. Step 6: Final answer
   x = 1,858.51