Finding the Fourth Proportional to 2,111.21, 2,913.46 and 1,179.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.21 : 2,913.46 = 1,179.71 : x
2. Step 2: Convert to fraction form
   2,111.21/2,913.46 = 1,179.71/x
3. Step 3: Cross multiply
   2,111.21x = 2,913.46 × 1,179.71
4. Step 4: Simplify right side
   2,111.21x = 3,437,017.43
5. Step 5: Solve for x
   x = 3,437,017.43/2,111.21
6. Step 6: Final answer
   x = 1,627.99