Finding the Fourth Proportional to 2,123.20, 3,182.10 and 1,148.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.20 : 3,182.10 = 1,148.50 : x
2. Step 2: Convert to fraction form
   2,123.20/3,182.10 = 1,148.50/x
3. Step 3: Cross multiply
   2,123.20x = 3,182.10 × 1,148.50
4. Step 4: Simplify right side
   2,123.20x = 3,654,641.85
5. Step 5: Solve for x
   x = 3,654,641.85/2,123.20
6. Step 6: Final answer
   x = 1,721.29