Finding the Fourth Proportional to 1,127.37, 1,555.57 and 684.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.37 : 1,555.57 = 684.98 : x
2. Step 2: Convert to fraction form
   1,127.37/1,555.57 = 684.98/x
3. Step 3: Cross multiply
   1,127.37x = 1,555.57 × 684.98
4. Step 4: Simplify right side
   1,127.37x = 1,065,534.34
5. Step 5: Solve for x
   x = 1,065,534.34/1,127.37
6. Step 6: Final answer
   x = 945.15