Finding the Fourth Proportional to 1,131.70, 1,695.72 and 583.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.70 : 1,695.72 = 583.12 : x
2. Step 2: Convert to fraction form
   1,131.70/1,695.72 = 583.12/x
3. Step 3: Cross multiply
   1,131.70x = 1,695.72 × 583.12
4. Step 4: Simplify right side
   1,131.70x = 988,808.25
5. Step 5: Solve for x
   x = 988,808.25/1,131.70
6. Step 6: Final answer
   x = 873.74