Finding the Fourth Proportional to 1,123.94, 1,686.28 and 575.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.94 : 1,686.28 = 575.98 : x
2. Step 2: Convert to fraction form
   1,123.94/1,686.28 = 575.98/x
3. Step 3: Cross multiply
   1,123.94x = 1,686.28 × 575.98
4. Step 4: Simplify right side
   1,123.94x = 971,263.55
5. Step 5: Solve for x
   x = 971,263.55/1,123.94
6. Step 6: Final answer
   x = 864.16