Finding the Fourth Proportional to 2,124.15, 2,931.18 and 1,179.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.15 : 2,931.18 = 1,179.89 : x
2. Step 2: Convert to fraction form
   2,124.15/2,931.18 = 1,179.89/x
3. Step 3: Cross multiply
   2,124.15x = 2,931.18 × 1,179.89
4. Step 4: Simplify right side
   2,124.15x = 3,458,461.88
5. Step 5: Solve for x
   x = 3,458,461.88/2,124.15
6. Step 6: Final answer
   x = 1,628.17