Finding the Fourth Proportional to 1,151.98, 1,719.76 and 1,111.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.98 : 1,719.76 = 1,111.48 : x
2. Step 2: Convert to fraction form
   1,151.98/1,719.76 = 1,111.48/x
3. Step 3: Cross multiply
   1,151.98x = 1,719.76 × 1,111.48
4. Step 4: Simplify right side
   1,151.98x = 1,911,478.84
5. Step 5: Solve for x
   x = 1,911,478.84/1,151.98
6. Step 6: Final answer
   x = 1,659.30