Finding the Fourth Proportional to 1,158.02, 1,597.42 and 685.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.02 : 1,597.42 = 685.75 : x
2. Step 2: Convert to fraction form
   1,158.02/1,597.42 = 685.75/x
3. Step 3: Cross multiply
   1,158.02x = 1,597.42 × 685.75
4. Step 4: Simplify right side
   1,158.02x = 1,095,430.77
5. Step 5: Solve for x
   x = 1,095,430.77/1,158.02
6. Step 6: Final answer
   x = 945.95