Finding the Fourth Proportional to 1,170, 1,616.76 and 1,113.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,170 : 1,616.76 = 1,113.06 : x
2. Step 2: Convert to fraction form
   1,170/1,616.76 = 1,113.06/x
3. Step 3: Cross multiply
   1,170x = 1,616.76 × 1,113.06
4. Step 4: Simplify right side
   1,170x = 1,799,550.89
5. Step 5: Solve for x
   x = 1,799,550.89/1,170
6. Step 6: Final answer
   x = 1,538.08