Finding the Fourth Proportional to 1,548.39, 2,139.57 and 1,105.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,548.39 : 2,139.57 = 1,105.53 : x
2. Step 2: Convert to fraction form
   1,548.39/2,139.57 = 1,105.53/x
3. Step 3: Cross multiply
   1,548.39x = 2,139.57 × 1,105.53
4. Step 4: Simplify right side
   1,548.39x = 2,365,358.82
5. Step 5: Solve for x
   x = 2,365,358.82/1,548.39
6. Step 6: Final answer
   x = 1,527.62