Finding the Fourth Proportional to 1,123.06, 1,681.98 and 573.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.06 : 1,681.98 = 573.88 : x
2. Step 2: Convert to fraction form
   1,123.06/1,681.98 = 573.88/x
3. Step 3: Cross multiply
   1,123.06x = 1,681.98 × 573.88
4. Step 4: Simplify right side
   1,123.06x = 965,254.68
5. Step 5: Solve for x
   x = 965,254.68/1,123.06
6. Step 6: Final answer
   x = 859.49