Finding the Fourth Proportional to 1,126.57, 1,554.78 and 684.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,126.57 : 1,554.78 = 684.51 : x
2. Step 2: Convert to fraction form
   1,126.57/1,554.78 = 684.51/x
3. Step 3: Cross multiply
   1,126.57x = 1,554.78 × 684.51
4. Step 4: Simplify right side
   1,126.57x = 1,064,262.46
5. Step 5: Solve for x
   x = 1,064,262.46/1,126.57
6. Step 6: Final answer
   x = 944.69