Finding the Fourth Proportional to 2,111.20, 2,913.60 and 1,179.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.20 : 2,913.60 = 1,179.52 : x
2. Step 2: Convert to fraction form
   2,111.20/2,913.60 = 1,179.52/x
3. Step 3: Cross multiply
   2,111.20x = 2,913.60 × 1,179.52
4. Step 4: Simplify right side
   2,111.20x = 3,436,649.47
5. Step 5: Solve for x
   x = 3,436,649.47/2,111.20
6. Step 6: Final answer
   x = 1,627.82