Finding the Fourth Proportional to 5,123.32, 7,689.53 and 2,659.84

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.32 : 7,689.53 = 2,659.84 : x
2. Step 2: Convert to fraction form
   5,123.32/7,689.53 = 2,659.84/x
3. Step 3: Cross multiply
   5,123.32x = 7,689.53 × 2,659.84
4. Step 4: Simplify right side
   5,123.32x = 20,452,906.90
5. Step 5: Solve for x
   x = 20,452,906.90/5,123.32
6. Step 6: Final answer
   x = 3,992.12