Finding the Fourth Proportional to 1,913.32, 2,640.27 and 1,116.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.32 : 2,640.27 = 1,116.55 : x
2. Step 2: Convert to fraction form
   1,913.32/2,640.27 = 1,116.55/x
3. Step 3: Cross multiply
   1,913.32x = 2,640.27 × 1,116.55
4. Step 4: Simplify right side
   1,913.32x = 2,947,993.47
5. Step 5: Solve for x
   x = 2,947,993.47/1,913.32
6. Step 6: Final answer
   x = 1,540.77