Finding the Fourth Proportional to 1,913.31, 2,640.92 and 1,127.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.31 : 2,640.92 = 1,127.82 : x
2. Step 2: Convert to fraction form
   1,913.31/2,640.92 = 1,127.82/x
3. Step 3: Cross multiply
   1,913.31x = 2,640.92 × 1,127.82
4. Step 4: Simplify right side
   1,913.31x = 2,978,476.76
5. Step 5: Solve for x
   x = 2,978,476.76/1,913.31
6. Step 6: Final answer
   x = 1,556.71