Finding the Fourth Proportional to 1,123.71, 1,551.56 and 682.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.71 : 1,551.56 = 682.21 : x
2. Step 2: Convert to fraction form
   1,123.71/1,551.56 = 682.21/x
3. Step 3: Cross multiply
   1,123.71x = 1,551.56 × 682.21
4. Step 4: Simplify right side
   1,123.71x = 1,058,482.46
5. Step 5: Solve for x
   x = 1,058,482.46/1,123.71
6. Step 6: Final answer
   x = 941.95