Finding the Fourth Proportional to 1,913.32, 2,640.50 and 1,127.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.32 : 2,640.50 = 1,127.43 : x
2. Step 2: Convert to fraction form
   1,913.32/2,640.50 = 1,127.43/x
3. Step 3: Cross multiply
   1,913.32x = 2,640.50 × 1,127.43
4. Step 4: Simplify right side
   1,913.32x = 2,976,978.92
5. Step 5: Solve for x
   x = 2,976,978.92/1,913.32
6. Step 6: Final answer
   x = 1,555.92