Finding the Fourth Proportional to 2,123.88, 2,930.85 and 1,179.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.88 : 2,930.85 = 1,179.67 : x
2. Step 2: Convert to fraction form
   2,123.88/2,930.85 = 1,179.67/x
3. Step 3: Cross multiply
   2,123.88x = 2,930.85 × 1,179.67
4. Step 4: Simplify right side
   2,123.88x = 3,457,435.82
5. Step 5: Solve for x
   x = 3,457,435.82/2,123.88
6. Step 6: Final answer
   x = 1,627.89