Finding the Fourth Proportional to 5,123.52, 7,686.36 and 1,660.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.52 : 7,686.36 = 1,660.50 : x
2. Step 2: Convert to fraction form
   5,123.52/7,686.36 = 1,660.50/x
3. Step 3: Cross multiply
   5,123.52x = 7,686.36 × 1,660.50
4. Step 4: Simplify right side
   5,123.52x = 12,763,200.78
5. Step 5: Solve for x
   x = 12,763,200.78/5,123.52
6. Step 6: Final answer
   x = 2,491.10