Finding the Fourth Proportional to 2,111.50, 2,913.96 and 1,180

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.50 : 2,913.96 = 1,180 : x
2. Step 2: Convert to fraction form
   2,111.50/2,913.96 = 1,180/x
3. Step 3: Cross multiply
   2,111.50x = 2,913.96 × 1,180
4. Step 4: Simplify right side
   2,111.50x = 3,438,472.80
5. Step 5: Solve for x
   x = 3,438,472.80/2,111.50
6. Step 6: Final answer
   x = 1,628.45