Finding the Fourth Proportional to 1,405.42, 2,103.54 and 1,270.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.42 : 2,103.54 = 1,270.69 : x
2. Step 2: Convert to fraction form
   1,405.42/2,103.54 = 1,270.69/x
3. Step 3: Cross multiply
   1,405.42x = 2,103.54 × 1,270.69
4. Step 4: Simplify right side
   1,405.42x = 2,672,947.24
5. Step 5: Solve for x
   x = 2,672,947.24/1,405.42
6. Step 6: Final answer
   x = 1,901.89