Finding the Fourth Proportional to 1,603.15, 2,392.18 and 1,270.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,603.15 : 2,392.18 = 1,270.31 : x
2. Step 2: Convert to fraction form
   1,603.15/2,392.18 = 1,270.31/x
3. Step 3: Cross multiply
   1,603.15x = 2,392.18 × 1,270.31
4. Step 4: Simplify right side
   1,603.15x = 3,038,810.18
5. Step 5: Solve for x
   x = 3,038,810.18/1,603.15
6. Step 6: Final answer
   x = 1,895.52