Finding the Fourth Proportional to 1,158.12, 1,598.76 and 716.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.12 : 1,598.76 = 716.22 : x
2. Step 2: Convert to fraction form
   1,158.12/1,598.76 = 716.22/x
3. Step 3: Cross multiply
   1,158.12x = 1,598.76 × 716.22
4. Step 4: Simplify right side
   1,158.12x = 1,145,063.89
5. Step 5: Solve for x
   x = 1,145,063.89/1,158.12
6. Step 6: Final answer
   x = 988.73