Finding the Fourth Proportional to 2,101.72, 2,888.45 and 2,043.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.72 : 2,888.45 = 2,043.40 : x
2. Step 2: Convert to fraction form
   2,101.72/2,888.45 = 2,043.40/x
3. Step 3: Cross multiply
   2,101.72x = 2,888.45 × 2,043.40
4. Step 4: Simplify right side
   2,101.72x = 5,902,258.73
5. Step 5: Solve for x
   x = 5,902,258.73/2,101.72
6. Step 6: Final answer
   x = 2,808.30