Finding the Fourth Proportional to 1,540.76, 2,123.72 and 1,043.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,540.76 : 2,123.72 = 1,043.21 : x
2. Step 2: Convert to fraction form
   1,540.76/2,123.72 = 1,043.21/x
3. Step 3: Cross multiply
   1,540.76x = 2,123.72 × 1,043.21
4. Step 4: Simplify right side
   1,540.76x = 2,215,470.11
5. Step 5: Solve for x
   x = 2,215,470.11/1,540.76
6. Step 6: Final answer
   x = 1,437.91