Finding the Fourth Proportional to 1,407.12, 1,942.36 and 1,259.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.12 : 1,942.36 = 1,259.48 : x
2. Step 2: Convert to fraction form
   1,407.12/1,942.36 = 1,259.48/x
3. Step 3: Cross multiply
   1,407.12x = 1,942.36 × 1,259.48
4. Step 4: Simplify right side
   1,407.12x = 2,446,363.57
5. Step 5: Solve for x
   x = 2,446,363.57/1,407.12
6. Step 6: Final answer
   x = 1,738.56