Finding the Fourth Proportional to 1,162.16, 1,601.93 and 913.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.16 : 1,601.93 = 913.05 : x
2. Step 2: Convert to fraction form
   1,162.16/1,601.93 = 913.05/x
3. Step 3: Cross multiply
   1,162.16x = 1,601.93 × 913.05
4. Step 4: Simplify right side
   1,162.16x = 1,462,644.47
5. Step 5: Solve for x
   x = 1,462,644.47/1,162.16
6. Step 6: Final answer
   x = 1,258.56