Finding the Fourth Proportional to 2,111.45, 2,913.80 and 1,179.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.45 : 2,913.80 = 1,179.95 : x
2. Step 2: Convert to fraction form
   2,111.45/2,913.80 = 1,179.95/x
3. Step 3: Cross multiply
   2,111.45x = 2,913.80 × 1,179.95
4. Step 4: Simplify right side
   2,111.45x = 3,438,139.69
5. Step 5: Solve for x
   x = 3,438,139.69/2,111.45
6. Step 6: Final answer
   x = 1,628.33