Finding the Fourth Proportional to 1,123.34, 1,550.18 and 681.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.34 : 1,550.18 = 681.17 : x
2. Step 2: Convert to fraction form
   1,123.34/1,550.18 = 681.17/x
3. Step 3: Cross multiply
   1,123.34x = 1,550.18 × 681.17
4. Step 4: Simplify right side
   1,123.34x = 1,055,924.95
5. Step 5: Solve for x
   x = 1,055,924.95/1,123.34
6. Step 6: Final answer
   x = 939.99