Finding the Fourth Proportional to 1,127.06, 1,555.43 and 684.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.06 : 1,555.43 = 684.88 : x
2. Step 2: Convert to fraction form
   1,127.06/1,555.43 = 684.88/x
3. Step 3: Cross multiply
   1,127.06x = 1,555.43 × 684.88
4. Step 4: Simplify right side
   1,127.06x = 1,065,281.89
5. Step 5: Solve for x
   x = 1,065,281.89/1,127.06
6. Step 6: Final answer
   x = 945.18