Finding the Fourth Proportional to 1,913.31, 2,640.16 and 1,116.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.31 : 2,640.16 = 1,116.42 : x
2. Step 2: Convert to fraction form
   1,913.31/2,640.16 = 1,116.42/x
3. Step 3: Cross multiply
   1,913.31x = 2,640.16 × 1,116.42
4. Step 4: Simplify right side
   1,913.31x = 2,947,527.43
5. Step 5: Solve for x
   x = 2,947,527.43/1,913.31
6. Step 6: Final answer
   x = 1,540.54