Finding the Fourth Proportional to 2,123.51, 2,930.42 and 1,179.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.51 : 2,930.42 = 1,179.31 : x
2. Step 2: Convert to fraction form
   2,123.51/2,930.42 = 1,179.31/x
3. Step 3: Cross multiply
   2,123.51x = 2,930.42 × 1,179.31
4. Step 4: Simplify right side
   2,123.51x = 3,455,873.61
5. Step 5: Solve for x
   x = 3,455,873.61/2,123.51
6. Step 6: Final answer
   x = 1,627.43